# Wifi not showing

**URL:** <https://forum.sunfounder.com/t/wifi-not-showing/4630>\
**Category:** General\
**Created:** [May 9, 2026, 9:20pm UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630 "2026-05-09T21:20:01Z")\
**Posts on this page:** 20\
**Page:** 1

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 9, 2026, 9:20pm UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/1 "2026-05-09T21:20:01Z")

</div>

Hello I made this zeus car than proceeded to connect to the wifi. It worked but after I uploaded new code than I tried reverting back to the old one by using the github but the wifi wouldn’t show I tried putting it in run position charging it checking my esp32 cam but every time my serial monitor prints garbage text which I thought was because of this Serial.begin(115200); but I tried every value and every time i get. Arduino ready as ESP32-CAM programmer

```auto
Arduino Car version 1.4.6

```

```auto
Initialzing...

```

```auto
SET+RESET

```

```auto
...[FAIL]

```

```auto
Arduino Car version 1.4.6

```

```auto
Initialzing...

```

```auto
SET+RESET

```

```auto
...[FAIL]

```

```auto
Arduino Car version 1.4.6

```

```auto
Initialzing...

```

```auto
SET+RESET

```

```auto
...[FAIL]

```

Ln 147, Col 3

Arduino UNO

on COM4

1. The cyan lights show up but it the wifi wont show

---

<div class="post-metadata">

**Author:** ![SunFounder\_Moderator](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\
**Post date:** [May 12, 2026, 1:19am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/2 "2026-05-12T01:19:41Z")

</div>

Based on the serial information you provided, the issue is likely not caused by the baud rate setting in Serial.begin(115200);. The serial repeatedly shows:

SET+RESET  
…[FAIL]

This indicates that the Arduino UNO is failing to initialize or reset the ESP32‑CAM module. As a result, the ESP32‑CAM cannot start its WiFi hotspot, which is why you don’t see the corresponding WiFi signal on your phone or computer.

Please follow these steps to check:

Send us the code you are currently running.

After the code is successfully uploaded, have you switched the mode switch to the Run side and pressed the Reset button?

Also, please take some photos of the Zeus Car expansion board and the ESP32‑CAM module and send them to us.

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 12, 2026, 9:12pm UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/3 "2026-05-12T21:12:24Z")

</div>

Thats the code for the main one I have also switched the run and upload switch```  
/\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*  
The control program of the Ardunio Mecanum wheel trolley.

Please install SunFounder Controller APP from APP Store(iOS) or Google Play(Android).

Development test environment:  
- Arduino IDE 1.8.19  
Board tools:  
- Arduino AVR Boards 1.8.3  
Libraries:  
- IRLremote  
- SoftPWM  
- ArduinoJson

Version: 1.5.0  
– [GitHub - sunfounder/zeus-car: SunFounder FPV Omni Car for Arduino · GitHub](https://github.com/sunfounder/zeus-car.git)

Documentation:  
– [Zeus Car - SunFounder Arduino Robot Car Kit — SunFounder Zeus Robot Car Kit for Arduino documentation](https://docs.sunfounder.com/projects/zeus-car/en/latest/)

Author: Sunfounder  
Website: [http://www.sunfounder.com](http://www.sunfounder.com)  
[https://docs.sunfounder.com](https://docs.sunfounder.com)

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*/  
#include “Zeus\_Car.h”

/\*\* Instantiate aicamera, a class for serial communication with ESP32-CAM \*/  
AiCamera aiCam = AiCamera(NAME, TYPE);

/\*\* global variables \*/  
// current state  
uint8\_t currentState = STATE\_IDLE;  
// last state  
uint8\_t lastState = 255;  
// line track power  
uint8\_t lineTrackPower = 0;  
// obstacle power  
uint8\_t obstaclePower = 0;  
// calibration State  
uint8\_t calibrationState = CALIBRATION\_STATE\_IDLE;  
// last mode  
uint8\_t lastMode = 255;  
// app control power  
int8\_t appControlPower = 0;  
// app control angle  
int16\_t appControlAngle = 0;  
// app control heading  
int16\_t appControlHeading = 0;  
// app control rotatePower  
int8\_t appControlRotatePower = 0;  
// app control move time ms  
uint16\_t appControlMoveTimeMs = 0;  
// app control moving state  
uint8\_t appControlMovingState = MOVING\_STATE\_IDLE;  
// app control move start time ms  
uint32\_t appControlMoveStartTimeMs = 0;  
// remote control state  
uint8\_t remoteControlState = REMOTE\_CONTROL\_STATE\_NONE;  
// variable of esp32-cam flash lamp  
bool cam\_lamp\_status = false;

/\*\*

- setup(), Ardunio main program entrance
- 
- Initialization of some peripherals  
\*/  
void setup() {  
int m = millis();  
Serial.begin(115200);  
Serial.print(F("Zeus Car version "));  
Serial.println(F(VERSION));

Serial.println(F(“Initialzing…”));  
SoftPWMBegin(); // init softpwm, before the motors initialization and the rgb LEDs initialization  
rgbBegin();  
rgbWrite(ORANGE); // init hint  
carBegin();  
irBegin();  
irObstacleBegin();  
gsBegin();

aiCam.begin(AP\_SSID, AP\_PASSWORD, PORT, false);  
aiCam.setOnReceivedBinary(onReceive);

while (millis() - m \< 500) { // Wait for peripherals to be ready  
delay(1);  
}

#if WATCH\_DOG  
wdt\_disable(); /\* Disable the watchdog and wait for more than 2 seconds _/  
delay(3000); /_ Done so that the Arduino doesn’t keep resetting infinitely in case of wrong configuration _/  
wdt\_enable(WDTO\_2S); /_ Enable the watchdog with a timeout of 2 seconds \*/  
#endif

Serial.println(F(“Okie!”));  
rgbWrite(GREEN); // init finished  
}

/\*\*

- loop(), Ardunio main loop
- 

\*/  
void loop() {  
if (lastState != currentState) {  
Serial.print(F("State changed to "));  
lastState = currentState;  
switch (currentState) {  
case STATE\_IDLE: {  
Serial.println(F(“IDLE”));  
rgbWrite(COLOR\_STATE\_IDLE);  
carStop();  
break;  
}  
case STATE\_IR: {  
Serial.println(F(“IR Remote”));  
currentMode = MODE\_REMOTE\_CONTROL;  
rgbWrite(COLOR\_STATE\_IR);  
if (lastState == STATE\_APP) {  
aiCam.reset(false);  
}  
break;  
}  
case STATE\_APP: {  
Serial.println(F(“APP”));  
currentMode = MODE\_REMOTE\_CONTROL;  
rgbWrite(COLOR\_STATE\_APP);  
break;  
}  
default:  
break;  
}  
}  
switch (currentState) {  
case STATE\_IDLE:  
{  
aiCam.loop();  
irRemoteHandler();  
if (aiCam.ws\_connected == true) {  
currentState = STATE\_APP;  
}  
break;  
}  
case STATE\_APP:  
{  
// Serial.println(F(“aiCam loop”));  
aiCam.loop();  
// Serial.println(F(“aiCam loop done”));  
handleSensorData();  
if (aiCam.ws\_connected == false) {  
currentState = STATE\_IDLE;  
}  
modeHandler();  
break;  
}  
case STATE\_IR:  
{  
irRemoteHandler();  
modeHandler();  
break;  
}  
default:  
break;  
}

#if WATCH\_DOG  
wdt\_reset(); /\* Reset the watchdog \*/  
#endif

#if MEM  
Serial.print(F("Free RAM = ")); // F function does the same and is now a built in library, in IDE \> 1.0.0  
Serial.println(freeMemory()); // print how much RAM is available in bytes.  
#endif  
}

/\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* Functions \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*/  
// [https://docs.arduino.cc/learn/programming/memory-guide](https://docs.arduino.cc/learn/programming/memory-guide)  
int freeRam() {  
extern int \_\_heap\_start, \*\_\_brkval;  
int v;  
return (int)&v - (\_\_brkval == 0 ? (int)&\_\_heap\_start : (int)\_\_brkval);  
}

/\*\*

- modeHandler(), Execute the corresponding program according to the set mode
- 
- 
  - inclued

- 
  - MODE\_NONE

- 
  - MODE\_LINE\_TRACK

- 
  - MODE\_OBSTACLE\_FOLLOWING

- 
  - MODE\_OBSTACLE\_AVOIDANCE

- 
  - MODE\_REMOTE\_CONTROL

- 
  - MODE\_COMPASS\_CALIBRATION  
_/  
void modeHandler() {  
if (lastMode != currentMode) {  
// Serial.print(F("Mode Change: “));Serial.print(lastMode);Serial.print(F(” → "));Serial.println(currentMode);  
if (lastMode == MODE\_COMPASS\_CALIBRATION && calibrationState != CALIBRATION\_STATE\_CALIBRATED) {  
// Serial.print(F(“Calibration interrupted”));  
calibrationState = CALIBRATION\_STATE\_INTERRUPTED;  
}  
}  
lastMode = currentMode;  
switch (currentMode) {  
case MODE\_LINE\_TRACK\_WITHOUT\_MAG:  
// rgbWrite(COLOR\_MODE\_LINE\_TRACK\_NO\_MAG);  
remotePower = LINE\_TRACK\_POWER;  
line\_track(false);  
break;  
case MODE\_LINE\_TRACK\_WITH\_MAG:  
// rgbWrite(COLOR\_MODE\_LINE\_TRACK\_MAG);  
remotePower = LINE\_TRACK\_POWER;  
line\_track(true);  
break;  
case MODE\_OBSTACLE\_FOLLOWING:  
// rgbWrite(COLOR\_MODE\_OBSTACLE\_FOLLOWING);  
remotePower = OBSTACLE\_FOLLOW\_POWER;  
obstacleFollowing();  
break;  
case MODE\_OBSTACLE\_AVOIDANCE:  
// rgbWrite(COLOR\_MODE\_OBSTACLE\_AVOIDANCE);  
remotePower = OBSTACLE\_AVOID\_POWER;  
obstacleAvoidance();  
break;  
case MODE\_REMOTE\_CONTROL:  
// rgbWrite(COLOR\_STATE\_APP);  
// Serial.print(“TEST MODE\_REMOTE\_CONTROL, angle:”);  
// Serial.print(appControlAngle);  
// Serial.print("power: ");  
// Serial.print(appControlPower);  
// Serial.print("rot: ");  
// Serial.println(appControlRotatePower);  
switch (remoteControlState) {  
case REMOTE\_CONTROL\_STATE\_CAR\_CENTRIC:  
carMove(appControlAngle, appControlPower, appControlRotatePower);  
break;  
case REMOTE\_CONTROL\_STATE\_FIELD\_CENTRIC:  
carMoveFieldCentric(appControlAngle, appControlPower, appControlHeading);  
break;  
case REMOTE\_CONTROL\_STATE\_NONE:  
break;  
// If move time is not zero, the car will move for the specified time and then stop.  
if (appControlMoveTimeMs \> 0) {  
// If the car is not moving, start moving  
if (appControlMovingState == MOVING\_STATE\_IDLE) {  
appControlMoveStartTimeMs = millis();  
appControlMovingState = MOVING\_STATE\_MOVING;  
} else {  
// If the car is moving, check if the time is up  
uint32\_t elapsedTimeMs = millis() - appControlMoveStartTimeMs;  
if (elapsedTimeMs \>= appControlMoveTimeMs) {  
appControlMovingState = MOVING\_STATE\_IDLE;  
appControlPower = 0;  
appControlAngle = 0;  
appControlHeading = 0;  
appControlRotatePower = 0;  
appControlMoveTimeMs = 0;  
appControlMoveStartTimeMs = 0;  
carStop();  
}  
}  
}  
}  
// carMoveFieldCentric(remoteAngle, remotePower, remoteHeading);  
// lastRemotePower = remotePower;  
break;  
case MODE\_COMPASS\_CALIBRATION:  
 #if WATCH\_DOG  
wdt\_disable(); /_ Disable the watchdog and wait for more than 2 seconds _/  
 #endif  
bool changed = compassCalibrateLoop();  
if (changed) {  
rgbWrite(GREEN);  
delay(20);  
rgbOff();  
}  
if (compassCalibrateDone()) {  
currentMode = MODE\_REMOTE\_CONTROL;  
calibrationState = CALIBRATION\_STATE\_CALIBRATED;  
carStop();  
}  
 #if WATCH\_DOG  
wdt\_enable(WDTO\_2S); /_ Enable the watchdog with a timeout of 2 seconds \*/  
#endif  
default:  
break;  
}  
}

/\*\*

- stopAll(), Stop the car  
\*/  
void stopAll() {  
currentMode = MODE\_REMOTE\_CONTROL;  
remoteControlState = REMOTE\_CONTROL\_STATE\_NONE;  
appControlPower = 0;  
appControlAngle = 0;  
appControlHeading = 0;  
appControlRotatePower = 0;  
appControlMoveTimeMs = 0;  
appControlMovingState = MOVING\_STATE\_IDLE;  
appControlMoveStartTimeMs = 0;  
calibrationState = CALIBRATION\_STATE\_IDLE;  
rgbOff();  
carStop();  
}

/\*\*

- Line track program
- 
- @param useMag whether to use the geomagnetic sensor to keep the direction of the car,
- 

```
          true(default), use the geomagnetic sensor,

```

- 

```
          false, without the geomagnetic sensor

```

\*/  
void line\_track(bool useMag) {  
uint16\_t result = gsGetAngleOffset();  
uint8\_t angleType = result \>\> 8 & 0xFF;  
uint8\_t offsetType = result & 0xFF;  
int16\_t angle = 0;  
int8\_t offset = 0;

switch (angleType) {  
case ANGLE\_N45:  
angle = -45;  
break;  
case ANGLE\_0:  
angle = 0;  
break;  
case ANGLE\_45:  
angle = 45;  
break;  
case ANGLE\_90:  
angle = 90;  
break;  
case ANGLE\_ERROR:  
angle = currentAngle;  
break;  
}  
switch (offsetType) {  
case OFFSET\_N1:  
offset = -1;  
break;  
case OFFSET\_0:  
offset = 0;  
break;  
case OFFSET\_1:  
offset = 1;  
break;  
case OFFSET\_ERROR:  
offset = 0;  
break;  
}

int16\_t deltaAngle = currentAngle - angle;  
if (deltaAngle \> 180) {  
deltaAngle -= 360;  
} else if (deltaAngle \< -180) {  
deltaAngle += 360;  
}

if (deltaAngle \> 90) {  
angle -= 180;  
offset \*= -1;  
} else if (deltaAngle \< -90) {  
angle += 180;  
offset \*= -1;  
}  
currentAngle = angle + (offset \* LINE\_TRACK\_OFFSET\_ANGLE);

if (useMag) {  
carMoveFieldCentric(currentAngle, lineTrackPower, 0, false, true);  
} else {  
carMove(currentAngle, lineTrackPower, 0, false);  
}  
}

/\*\*

- Obstacle follow program  
\*/  
void obstacleFollowing() {  
byte result = irObstacleRead();  
bool leftIsClear = result & 0b00000001;  
bool rightIsClear = result & 0b00000010;  
float usDistance = ultrasonicRead();

if (usDistance \< 4) {  
carStop();  
} else if (usDistance \< 10) {  
carForward(30);  
} else if (usDistance \< FOLLOW\_DISTANCE) {  
carForward(OBSTACLE\_FOLLOW\_POWER);  
} else {  
if (!leftIsClear) {  
carTurnLeft(obstaclePower);  
} else if (!rightIsClear) {  
carTurnRight(obstaclePower);  
} else {  
carStop();  
}  
}  
}

/\*\*

- Obstacle avoidance program  
\*/  
int8\_t last\_clear = -1; // last\_clear, 1, left; -1, right;  
bool last\_forward = false;

void obstacleAvoidance() {  
byte result = irObstacleRead();  
bool leftIsClear = result & 0b00000001;  
bool rightIsClear = result & 0b00000010;  
bool middleIsClear = ultrasonicIsClear();

if (middleIsClear && leftIsClear && rightIsClear) { // 111  
last\_forward = true;  
carForward(OBSTACLE\_AVOID\_POWER);  
} else {  
if ((leftIsClear && rightIsClear) || (!leftIsClear && !rightIsClear)) { // 101, 000, 010  
carMove(0, 0, last\_clear \* 50); // last\_clear=1, turn left  
last\_forward = false;  
} else if (leftIsClear) { // 100, 110  
if (last\_clear == 1 || last\_forward == true) {  
carTurnLeft(OBSTACLE\_AVOID\_POWER);  
last\_clear = 1;  
last\_forward = false;  
}  
} else if (rightIsClear) { // 001, 011  
if (last\_clear == -1 || last\_forward == true) {  
carTurnRight(OBSTACLE\_AVOID\_POWER);  
last\_clear = -1;  
last\_forward = false;  
}  
}  
}  
}

/\*\*

- irRemoteHandler, handle IR remote control key events  
\*/  
void irRemoteHandler() {

uint8\_t key = irRead();  
if (key == IR\_KEY\_ERROR) {  
return; // No key pressed  
} else {  
remotePower = IR\_REMOTE\_POWER;  
currentState = STATE\_IR;  
}

int8\_t cmd\_code = ir\_key\_2\_cmd\_code(key);  
if (cmd\_code != -1) {  
currentMode = MODE\_REMOTE\_CONTROL;  
cmd\_fuc\_tablecmd\_code;  
} else {  
switch (key) {  
case IR\_KEY\_MODE:  
break;  
case IR\_KEY\_MUTE:  
currentMode = MODE\_COMPASS\_CALIBRATION;  
carMove(0, 0, CAR\_CALIBRATION\_POWER);  
compassCalibrateStart();  
break;  
case IR\_KEY\_PLAY\_PAUSE:  
carResetHeading();  
currentMode = MODE\_LINE\_TRACK\_WITH\_MAG;  
break;  
case IR\_KEY\_EQ:  
carResetHeading();  
currentMode = MODE\_LINE\_TRACK\_WITHOUT\_MAG;  
break;  
case IR\_KEY\_BACKWARD:  
carResetHeading();  
currentMode = MODE\_OBSTACLE\_FOLLOWING;  
break;  
case IR\_KEY\_FORWARD:  
carResetHeading();  
currentMode = MODE\_OBSTACLE\_AVOIDANCE;  
break;  
case IR\_KEY\_MINUS: // drift left  
currentMode = MODE\_REMOTE\_CONTROL;  
remoteAngle = 0;  
remotePower = lastRemotePower;  
remoteHeading = -90;  
remoteDriftEnable = true;  
carResetHeading();  
break;  
case IR\_KEY\_PLUS: // drift right  
currentMode = MODE\_REMOTE\_CONTROL;  
remoteAngle = 0;  
remotePower = lastRemotePower;  
remoteHeading = 90;  
remoteDriftEnable = true;  
carResetHeading();  
break;  
case IR\_KEY\_0: // Reset origin direction  
currentMode = MODE\_REMOTE\_CONTROL;  
remoteAngle = 0;  
remotePower = 0;  
remoteHeading = 0;  
remoteDriftEnable = false;  
carStop();  
carResetHeading();  
break;  
}  
}  
}

/\*\*

- websocket received data processing  
\*/  
void onReceive() {  
Serial.print(“onReceive:”);  
for (int i = 0; i \< aiCam.recvBufferLength; i++) {  
Serial.print(aiCam.recvBuffer[i], HEX);  
Serial.print(" “);  
}  
Serial.println(” “);  
for (int i = 0; i \< aiCam.recvBufferLength; i++) {  
uint8\_t entityId = aiCam.recvBuffer[i];  
switch (entityId) {  
case 0x01: // Car move car centric  
{  
i += 1;  
uint8\_t angleMSB = aiCam.recvBuffer[i];  
i += 1;  
uint8\_t angleLSB = aiCam.recvBuffer[i];  
i += 1;  
int8\_t movePower = aiCam.recvBuffer[i];  
i += 1;  
int8\_t rotatePower = aiCam.recvBuffer[i];  
int16\_t angle = (angleMSB \<\< 8) | angleLSB;  
// Serial.println(“Car move car centric”);  
// Serial.print(“angle:”);Serial.println(angle);  
// Serial.print(“movePower:”);Serial.println(movePower);  
// Serial.print(“rotatePower:”);Serial.println(rotatePower);  
// carMove(angle, movePower, rotatePower);  
appControlAngle = angle;  
appControlPower = movePower;  
appControlRotatePower = rotatePower;  
currentMode = MODE\_REMOTE\_CONTROL;  
remoteControlState = REMOTE\_CONTROL\_STATE\_CAR\_CENTRIC;  
break;  
}  
case 0x02: // Car move field centric  
{  
i += 1;  
uint8\_t moveAngleMSB = aiCam.recvBuffer[i];  
i += 1;  
uint8\_t moveAngleLSB = aiCam.recvBuffer[i];  
i += 1;  
int8\_t movePower = aiCam.recvBuffer[i];  
i += 1;  
uint8\_t headingAngleMSB = aiCam.recvBuffer[i];  
i += 1;  
uint8\_t headingAngleLSB = aiCam.recvBuffer[i];  
int16\_t moveAngle = (moveAngleMSB \<\< 8) | moveAngleLSB;  
int16\_t headingAngle = (headingAngleMSB \<\< 8) | headingAngleLSB;  
// Serial.println(F(“Car move field centric”));  
// Serial.print(F(“moveAngle:”));Serial.println(moveAngle);  
// Serial.print(F(“movePower:”));Serial.println(movePower);  
// Serial.print(F(“headingAngle:”));Serial.println(headingAngle);  
// carMoveFieldCentric(moveAngle, movePower, headingAngle);  
appControlAngle = moveAngle;  
appControlPower = movePower;  
appControlHeading = headingAngle;  
currentMode = MODE\_REMOTE\_CONTROL;  
remoteControlState = REMOTE\_CONTROL\_STATE\_FIELD\_CENTRIC;  
break;  
}  
case 0x03: // Direct motor control  
{  
i += 1;  
int8\_t motor0 = aiCam.recvBuffer[i];  
i += 1;  
int8\_t motor1 = aiCam.recvBuffer[i];  
i += 1;  
int8\_t motor2 = aiCam.recvBuffer[i];  
i += 1;  
int8\_t motor3 = aiCam.recvBuffer[i];  
// Serial.println(F(“Direct motor control”));  
// Serial.print(F(“motor0:”));Serial.println(motor0);  
// Serial.print(F(“motor1:”));Serial.println(motor1);  
// Serial.print(F(“motor2:”));Serial.println(motor2);  
// Serial.print(F(“motor3:”));Serial.println(motor3);  
currentMode = MODE\_REMOTE\_CONTROL;  
remoteControlState = REMOTE\_CONTROL\_STATE\_NONE;  
carSetMotors(motor0, motor1, motor2, motor3);  
break;  
}  
case 0x04: // RGB control  
{  
i += 1;  
uint8\_t r = aiCam.recvBuffer[i];  
i += 1;  
uint8\_t g = aiCam.recvBuffer[i];  
i += 1;  
uint8\_t b = aiCam.recvBuffer[i];  
// Serial.println(F(“Set RGB: (”));Serial.print(r);  
// Serial.print(F(”, “));Serial.print(g);  
// Serial.print(F(”, “));Serial.print(b);Serial.println(”)“);  
rgbWrite(r, g, b);  
break;  
}  
case 0x05: // Set User Heading  
{  
i += 1;  
uint8\_t userHeadingMSB = aiCam.recvBuffer[i];  
i += 1;  
uint8\_t userHeadingLSB = aiCam.recvBuffer[i];  
int16\_t userHeading = (userHeadingMSB \<\< 8) | userHeadingLSB;  
// Serial.print(F(“Set Heading: “));Serial.println(userHeading);  
carSetHeading(userHeading);  
break;  
}  
case 0x06: // Calibrate compass  
{  
i += 1;  
uint8\_t state = aiCam.recvBuffer[i];  
if (state == 0) {  
// Serial.println(F(“Compass calibration stop”));  
currentMode = MODE\_REMOTE\_CONTROL;  
calibrationState = CALIBRATION\_STATE\_INTERRUPTED;  
carStop();  
} else if (state == 1) {  
if (currentMode == MODE\_COMPASS\_CALIBRATION) break;  
Serial.println(F(“Calibrate compass”));  
carMove(0, 0, CAR\_CALIBRATION\_POWER);  
compassCalibrateStart();  
currentMode = MODE\_COMPASS\_CALIBRATION;  
calibrationState = CALIBRATION\_STATE\_CALIBRATING;  
}  
break;  
}  
case 0x07: // Line Track mode  
{  
i += 1;  
uint8\_t state = aiCam.recvBuffer[i];  
i += 1;  
uint8\_t mag = aiCam.recvBuffer[i];  
i += 1;  
lineTrackPower = aiCam.recvBuffer[i];  
// Serial.print(F(“Line Track”));  
if (state == 1) {  
// Serial.print(F(” ON”));  
if (mag == 1) {  
// Serial.print(F(” with mag"));  
currentMode = MODE\_LINE\_TRACK\_WITH\_MAG;  
} else {  
// Serial.print(F(" without mag"));  
currentMode = MODE\_LINE\_TRACK\_WITHOUT\_MAG;  
}  
} else {  
// Serial.print(F(" OFF"));  
currentMode = MODE\_REMOTE\_CONTROL;  
carStop();  
}  
// Serial.print(F(" power:“));Serial.println(lineTrackPower);  
break;  
}  
case 0x08: // Obstacle mode  
{  
i += 1;  
uint8\_t state = aiCam.recvBuffer[i];  
i += 1;  
uint8\_t mode = aiCam.recvBuffer[i];  
i += 1;  
obstaclePower = aiCam.recvBuffer[i];  
// Serial.print(F(“Obstacle “));  
if (state) {  
// Serial.print(F(” ON”));  
if (mode == 0) {  
// Serial.print(F(” avoidance"));  
currentMode = MODE\_OBSTACLE\_AVOIDANCE;  
} else {  
// Serial.print(F(" following"));  
currentMode = MODE\_OBSTACLE\_FOLLOWING;  
}  
} else {  
// Serial.print(F(" OFF"));  
currentMode = MODE\_REMOTE\_CONTROL;  
carStop();  
}  
// Serial.print(F(" power:"));Serial.println(obstaclePower);  
break;  
}  
case 0x09: // Car move car centric for ms  
{  
i += 1;  
uint8\_t angleMSB = aiCam.recvBuffer[i];  
i += 1;  
uint8\_t angleLSB = aiCam.recvBuffer[i];  
i += 1;  
int8\_t movePower = aiCam.recvBuffer[i];  
i += 1;  
int8\_t rotatePower = aiCam.recvBuffer[i];  
i += 1;  
int8\_t moveTimeMsMSB = aiCam.recvBuffer[i];  
i += 1;  
int8\_t moveTimeMsLSB = aiCam.recvBuffer[i];

void handleSensorData() {  
uint8\_t toSend[WS\_BUFFER\_SIZE];  
int index = 0;  
toSend[index] = WS\_DATA\_START\_BIT;

// data length placeholder  
index += 1;  
toSend[index] = 0x00;

// checksum placeholder  
index += 1;  
toSend[index] = 0x00;

// UltraSonic  
index += 1;  
toSend[index] = 0x81;  
uint16\_t ultrasonicMM = ultrasonicRead() \* 10.0;  
uint8\_t ultrasonicMMMSB = ultrasonicMM \>\> 8;  
uint8\_t ultrasonicMMLS = ultrasonicMM & 0xFF;  
index += 1;  
toSend[index] = ultrasonicMMMSB;  
index += 1;  
toSend[index] = ultrasonicMMLS;

// IR Obstacle  
index += 1;  
toSend[index] = 0x82;  
uint8\_t irObstacle = irObstacleRead();  
index += 1;  
toSend[index] = irObstacle;

// Grayscale Value  
index += 1;  
toSend[index] = 0x83;  
uint8\_t grayscale = gsRead();  
index += 1;  
toSend[index] = grayscale;

// Grayscale State  
index += 1;  
toSend[index] = 0x84;  
uint16\_t grayscaleState = gsGetAngleOffset();  
uint8\_t grayscaleAngle = grayscaleState \>\> 8;  
uint8\_t grayscaleOffset = grayscaleState & 0xFF;  
index += 1;  
toSend[index] = grayscaleAngle | grayscaleOffset \<\< 3;

// User Heading  
index += 1;  
toSend[index] = 0x85;  
int16\_t userHeading = carGetHeading();  
// Serial.print(“userHeading:”);Serial.println(userHeading);  
uint8\_t userHeadingMSB = userHeading \>\> 8;  
uint8\_t userHeadingLSB = userHeading & 0xFF;  
index += 1;  
toSend[index] = userHeadingMSB;  
index += 1;  
toSend[index] = userHeadingLSB;

// Car Heading  
index += 1;  
toSend[index] = 0x86;  
int16\_t carHeading = compassReadAngle();  
// Serial.print(“car heading:”);Serial.println(carHeading);  
uint8\_t carHeadingMSB = carHeading \>\> 8;  
uint8\_t carHeadingLSB = carHeading & 0xFF;  
index += 1;  
toSend[index] = carHeadingMSB;  
index += 1;  
toSend[index] = carHeadingLSB;

// Calibration State  
index += 1;  
toSend[index] = 0x87;  
index += 1;  
toSend[index] = calibrationState;

// Car Moving State  
index += 1;  
toSend[index] = 0x88;  
index += 1;  
toSend[index] = appControlMovingState;

// End bit  
index += 1;  
toSend[index] = WS\_DATA\_END\_BIT;

uint8\_t payloadLength = index + 1;

// Data length  
toSend[1] = payloadLength - 4;

// Checksum  
uint8\_t checksum = 0;  
for (int i = 0; i \< payloadLength - 1; i++) {  
checksum ^= toSend[i];  
}  
toSend[2] = checksum;

aiCam.sendBinaryData(toSend, payloadLength);  
}

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 12, 2026, 10:19pm UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/4 "2026-05-12T22:19:53Z")

</div>

![1000009526](https://canada1.discourse-cdn.com/flex029/uploads/sunfounder/original/2X/0/0a8d95133de6292460fb4c97becff426fee90cfe.jpeg)  
 ![1000009527](https://canada1.discourse-cdn.com/flex029/uploads/sunfounder/original/2X/0/0cc5dec8fba1c123882c2d0be518c3e106a006d9.jpeg)  
 ![1000009524](https://canada1.discourse-cdn.com/flex029/uploads/sunfounder/original/2X/f/f593c6bdb42d808938af1510259bad15471e7114.jpeg)

---

<div class="post-metadata">

**Author:** ![SunFounder\_Moderator](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\
**Post date:** [May 14, 2026, 1:25am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/5 "2026-05-14T01:25:49Z")

</div>

Apologize for the confusion in my previous message. I meant to ask for a screenshot or the code file, but my wording was incorrect.

From your description, it seems you have downloaded the wrong code. The version you used (1.5) is intended for new Scratch software compatibility and has not been released yet.

Please use one of the following methods to upload the correct code:

Method 1 – Download the correct code directly:

[https://github.com/sunfounder/zeus-car/archive/refs/heads/main.zip](https://github.com/sunfounder/zeus-car/archive/refs/heads/main.zip)

Method 2 – Follow the tutorial to upload the code via the update-arduino-firmware.bat script:

[https://docs.sunfounder.com/projects/zeus-car/en/latest/faq.html#how-to-upload-the-zeus-car-ino-code](https://docs.sunfounder.com/projects/zeus-car/en/latest/faq.html#how-to-upload-the-zeus-car-ino-code)

Both methods will upload the Zeus\_Car.ino file to the Uno R3 board. You can choose either one.

After the code is successfully uploaded:

Reconnect the ESP32‑CAM module.

Press the Reset button on the board.

You should now see the Zeus Car WiFi network on your mobile device.

If you still encounter any issues, please let me know.

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 16, 2026, 7:19pm UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/6 "2026-05-16T19:19:26Z")

</div>

I have tried to buy a new esp32 cam because the other one was not working i am using a FT232 adapter but when I try to upload it i get an error I have tried to use a slower baud or even switch the TXD and RXD and tried to time the rst button with the connection the esp32 cam I bought is the same its a Esp32-32S

---

<div class="post-metadata">

**Author:** ![SunFounder\_Moderator](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\
**Post date:** [May 19, 2026, 10:04am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/7 "2026-05-19T10:04:39Z")

</div>

Thank you for your message.

If you purchased the same kit as ours, you do not need an FT232 adapter to flash the firmware. You can simply insert the ESP32 CAM into the Camera Adapter Board, and then use the Uno R3 board to update the ESP32 CAM firmware.

In my previous reply, I asked you to update the Uno R3 code because you had uploaded the wrong version (1.5).

Now that you have purchased a new ESP32-S module, you need to upload the correct firmware to it. Please follow the steps below:

Steps to flash the ESP32 CAM firmware:  
Download the firmware from the following link:  
[https://github.com/sunfounder/ai-camera-firmware/archive/refs/tags/1.4.3.zip](https://github.com/sunfounder/ai-camera-firmware/archive/refs/tags/1.4.3.zip)

Extract the downloaded zip file, then navigate to the following folder:  
ai-camera-firmware-1.4.3\burn-esp32-cam-bat

Double-click install\_ESP32.bat and wait for the flashing process to complete.

Additional observation from your photo:  
In the photo you attached, the D1 LED on the Camera Adapter Board is not lit. This could indicate:

The ESP32 CAM module is faulty, or

The 7‑pin cable is defective

Please try using a different 7‑pin cable and test again.

Let me know the results. Thank you for your patience and cooperation.

 ![image - 2026-05-19T180300.325](https://canada1.discourse-cdn.com/flex029/uploads/sunfounder/original/2X/f/fef24e672a6455fc4ef06385d23ffa807161616f.jpeg)

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 25, 2026, 5:37pm UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/8 "2026-05-25T17:37:46Z")

</div>

yeah I tried that already but I keep getting an error i got a new esp32 and the led is red now but this is still appearing C:\Users\yosya\Downloads\ai-camera-firmware\burn-esp32-cam-bat\>set baud=921600

C:\Users\yosya\Downloads\ai-camera-firmware\burn-esp32-cam-bat\>set factory\_firmware=“ai-camera-firmware.v1.4.3-factory.bin”

C:\Users\yosya\Downloads\ai-camera-firmware\burn-esp32-cam-bat\>esptool.exe --chip esp32 --baud 921600 --before default\_reset erase\_flash  
esptool.py v4.5.1  
Found 2 serial ports  
Serial port COM4  
Connecting…  
COM4 failed to connect: Failed to connect to ESP32: No serial data received.  
For troubleshooting steps visit: [Troubleshooting - ESP32 - — esptool latest documentation](https://docs.espressif.com/projects/esptool/en/latest/troubleshooting.html)  
Serial port COM3  
Connecting…  
COM3 failed to connect: Failed to connect to ESP32: No serial data received.  
For troubleshooting steps visit: [Troubleshooting - ESP32 - — esptool latest documentation](https://docs.espressif.com/projects/esptool/en/latest/troubleshooting.html)

A fatal error occurred: Could not connect to an Espressif device on any of the 2 available serial ports.

C:\Users\yosya\Downloads\ai-camera-firmware\burn-esp32-cam-bat\>esptool.exe --chip esp32 --baud 921600 --before default\_reset write\_flash -z --flash\_mode dio --flash\_freq 80m --flash\_size 4MB 0x0 “ai-camera-firmware.v1.4.3-factory.bin”  
esptool.py v4.5.1  
Found 2 serial ports  
Serial port COM4  
Connecting…  
COM4 failed to connect: Failed to connect to ESP32: No serial data received.  
For troubleshooting steps visit: [Troubleshooting - ESP32 - — esptool latest documentation](https://docs.espressif.com/projects/esptool/en/latest/troubleshooting.html)  
Serial port COM3  
Connecting…  
COM3 failed to connect: Failed to connect to ESP32: No serial data received.  
For troubleshooting steps visit: [Troubleshooting - ESP32 - — esptool latest documentation](https://docs.espressif.com/projects/esptool/en/latest/troubleshooting.html)

A fatal error occurred: Could not connect to an Espressif device on any of the 2 available serial ports.

C:\Users\yosya\Downloads\ai-camera-firmware\burn-esp32-cam-bat\>pause  
Press any key to continue . . .

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 25, 2026, 11:45pm UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/9 "2026-05-25T23:45:23Z")

</div>

I have also tried uploading code to my Arduino but it keeps giving me text in the serial monitor from the old code I have tried holding down reset button and everything but nothing seems to work this was working perfectly fine a couple of days ago.

---

<div class="post-metadata">

**Author:** ![SunFounder\_Moderator](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\
**Post date:** [May 26, 2026, 9:27am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/10 "2026-05-26T09:27:09Z")

</div>

Thank you for your additional explanation.

Since you are now using an FT232 adapter and have already tried:

Lowering the baud rate

Swapping TXD / RXD

Adjusting the RST timing

The issue now appears to be that the ESP32 CAM is not entering download mode correctly, or there is a connection problem between the FT232 adapter and the ESP32 CAM.

Please double‑check the following wiring:

FT232 TXD → ESP32 U0R  
FT232 RXD → ESP32 U0T  
GND → GND  
5V → 5V

Flashing procedure:  
Connect IO0 to GND on the ESP32 CAM.

Press the RST button (or power cycle the ESP32 CAM).

Run the flashing command.

After flashing is complete, disconnect IO0 from GND.

Power supply:  
Since the ESP32‑CAM draws higher current during flashing, we recommend powering the FT232 adapter with 5V (not 3.3V).

From your log:

Failed to connect to ESP32: No serial data received

This usually means the ESP32 did not enter the correct download mode – it is not a problem with the firmware file itself.

Please also confirm:  
Does only one correct COM port appear in Windows Device Manager?

Is the FT232 driver installed properly?

After powering on the ESP32‑CAM, is the red LED solid on?

Finally, please send us a clear photo showing the current wiring between the FT232 adapter and the ESP32‑CAM, and if possible, a short video of your entire flashing procedure. This will help us identify the issue more accurately.You can also upload the video to Google Drive or OneDrive and share the link with me.

Thank you for your patience and cooperation.

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 27, 2026, 1:22am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/11 "2026-05-27T01:22:05Z")

</div>

2 Com appears com4 and Com 3 but Com3 seems like its built into the computer. The red Led is on. Also my arduino when I upload code it seems perfectly fine but when I go to serial monitor it shows me old text that I thought I overwritten because I uploaded new code.

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 27, 2026, 1:37am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/12 "2026-05-27T01:37:56Z")

</div>

like it gives me Sketch uses 1678 bytes (5%) of program storage space. Maximum is 32256 bytes.  
Global variables use 218 bytes (10%) of dynamic memory, leaving 1830 bytes for local variables. Maximum is 2048 bytes.  
“C:\Users\yosya\AppData\Local\Arduino15\packages\arduino\tools\avrdude\8.0.0-arduino1/bin/avrdude” “-CC:\Users\yosya\AppData\Local\Arduino15\packages\arduino\tools\avrdude\8.0.0-arduino1/etc/avrdude.conf” -v -patmega328p -carduino “-PCOM4” -b115200 -D “-Uflash:w:C:\Users\yosya\AppData\Local\arduino\sketches\EEA5AAA1059759410C6BBC10A30F018F/sketch\_apr19a.ino.hex:i”  
Avrdude version 8.0-arduino.1  
Copyright see [avrdude/AUTHORS at main · avrdudes/avrdude · GitHub](https://github.com/avrdudes/avrdude/blob/main/AUTHORS)

System wide configuration file is C:\Users\yosya\AppData\Local\Arduino15\packages\arduino\tools\avrdude\8.0.0-arduino1\etc\avrdude.conf

Using port : COM4  
Using programmer : arduino  
Setting baud rate : 115200  
AVR part : ATmega328P  
Programming modes : SPM, ISP, HVPP, debugWIRE  
Programmer type : Arduino  
Description : Arduino bootloader using STK500 v1 protocol  
HW Version : 3  
FW Version : 4.4

AVR device initialized and ready to accept instructions  
Device signature = 1E 95 0F (ATmega328P, ATA6614Q, LGT8F328P)  
Reading 1678 bytes for flash from input file sketch\_apr19a.ino.hex  
in 1 section [0, 0x68d]: 14 pages and 114 pad bytes  
Writing 1678 bytes to flash  
Writing | ################################################## | 100% 0.23s  
Reading | ################################################## | 100% 0.21s  
Warning: flash verification mismatch  
device 0x62 != input 0x0c at addr 0x0000 (error)  
device 0x62 != input 0x94 at addr 0x0001 (error)  
device 0x62 != input 0x35 at addr 0x0002 (error)  
device 0x62 != input 0x00 at addr 0x0003 (error)  
device 0x62 != input 0x0c at addr 0x0004 (error)  
device 0x62 != input 0x94 at addr 0x0005 (error)  
device 0x62 != input 0x5d at addr 0x0006 (error)  
device 0x62 != input 0x00 at addr 0x0007 (error)  
device 0x62 != input 0x0c at addr 0x0008 (error)  
device 0x62 != input 0x94 at addr 0x0009 (error)  
suppressing further verification errors  
Error: flash verification mismatch

Avrdude done. Thank you.  
Failed uploading: uploading error: exit status 1 error when i upload

---

<div class="post-metadata">

**Author:** ![SunFounder\_Moderator](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\
**Post date:** [May 27, 2026, 9:00am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/13 "2026-05-27T09:00:12Z")

</div>

Thank you for your continued efforts. I feel that our communication has become a bit confusing. Previously you were asking about ESP32‑CAM firmware flashing, and now you are encountering an UNO R3 code upload issue.

To make progress, I suggest that we focus on one issue at a time, and email ([support@sunfounder.com](mailto:support@sunfounder.com)) is a better channel for step‑by‑step troubleshooting.

Let’s concentrate on the UNO R3 upload problem first.

From the log you provided, the code did not upload successfully. The key error is:  
Warning: flash verification mismatch  
Error: flash verification mismatch  
Failed uploading: uploading error: exit status 1

This means that after the Arduino IDE wrote the code to the board, the verification step (reading back the flashed content) found that it did not match the intended program. Therefore, the old program is still running, which is why you still see the old text in the Serial Monitor.

Additional observations:  
COM4 appears to be the correct port.

The red LED being solid usually only indicates that the board is receiving power.

Please try the following steps:  
In the Arduino IDE, confirm that the board selected is Arduino Uno.

Use COM4(do not use COM3).

Close the Serial Monitor before uploading.

Disconnect the ESP32‑CAM from the board before uploading (it shares the same RX/TX pins).

Try a different USB cable or a different USB port on your computer.

For detailed instructions, please refer to:

👉 [https://docs.sunfounder.com/projects/zeus-car/en/latest/faq.html#how-to-upload-the-zeus-car-ino-code](https://docs.sunfounder.com/projects/zeus-car/en/latest/faq.html#how-to-upload-the-zeus-car-ino-code)

Once we resolve the UNO R3 upload issue, we can then move on to the ESP32‑CAM firmware flashing. Tackling one problem at a time will make it much easier to identify the root cause.

Please let me know the result after trying the steps above.

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 27, 2026, 7:13pm UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/14 "2026-05-27T19:13:55Z")

</div>

I have tried all those methods Like for example the esp32 cam Was never plugged in so it couldn’t be that I have confirmed the port and the board serveral times.

---

<div class="post-metadata">

**Author:** ![SunFounder\_Moderator](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\
**Post date:** [May 28, 2026, 7:35am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/15 "2026-05-28T07:35:03Z")

</div>

Thank you for your patience, and I apologize for the confusion in our previous communications. To move forward effectively, let’s focus on one fundamental question first: Can your Arduino UNO R3 successfully upload any code at all?

Based on the log you provided on May 27, the flash verification mismatch error indicates that the code is not actually being written to the UNO.

Please follow these steps carefully and let me know the result of each step:

**Step 1 – Disconnect everything**  
Disconnect all accessories from the UNO R3, including:ESP32‑CAM/Any expansion boards/The 7‑pin ribbon cable/Any sensors or other wiring

Leave only the USB cable connected to your computer.

**Step 2 – Upload a simple test sketch**  
Open the Arduino IDE, then go to:File → Examples → 01.Basics → Blink，Then select the board: Arduino Uno，Select the port: COM4

\*\*Make sure the Serial Monitor is closed before uploading.\*\*Click the Upload button.

**Step 3 – Observe the result**  
Does the Blink example upload successfully? (If successful, the onboard LED on the UNO will start blinking.)If it fails, please send me the complete error log.

**Why this step is important**  
Only when this basic test succeeds can we be sure that your UNO board and computer environment are working correctly. After that, we will gradually reconnect the accessories one by one to find the real cause of the WiFi issue.

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 29, 2026, 1:11am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/16 "2026-05-29T01:11:15Z")

</div>

Yes I burned the bootloader by buying another Arduino. It took me a couple of tries but like magic it worked. Thanks this has taken me very long

---

<div class="post-metadata">

**Author:** ![SunFounder\_Moderator](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\
**Post date:** [May 29, 2026, 10:28am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/17 "2026-05-29T10:28:56Z")

</div>

Just to confirm – does this mean that your Uno R3 can now upload code successfully?

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [May 29, 2026, 9:10pm UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/18 "2026-05-29T21:10:08Z")

</div>

Yes this means the upload code is can successfuly upload now

---

<div class="post-metadata">

**Author:** ![SunFounder\_Moderator](https://avatars.discourse-cdn.com/v4/letter/s/34f0e0/32.png) [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\
**Post date:** [June 1, 2026, 9:28am UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/19 "2026-06-01T09:28:57Z")

</div>

That’s great to hear. Are you now able to configure the Zeus Car successfully and use it as intended? Or have you reached a certain stage where you need further assistance from us?

Please let us know the current status, and if you are still facing any issues, feel free to describe them. We are here to help.

---

<div class="post-metadata">

**Author:** ![nin](https://avatars.discourse-cdn.com/v4/letter/n/77aa72/32.png) [@nin](https://forum.sunfounder.com/u/nin)\
**Post date:** [June 7, 2026, 1:40pm UTC](https://forum.sunfounder.com/t/wifi-not-showing/4630/20 "2026-06-07T13:40:30Z")

</div>

Yes I Am fully complete and I do not need any further assistance