# Learning kit for Arduino **URL:** https://forum.sunfounder.com/c/learning-kit-for-arduino/11.md [Latest](https://forum.sunfounder.com/latest.md) · [Categories](https://forum.sunfounder.com/categories.md) · [Tags](https://forum.sunfounder.com/tags.md) --- ## [About the Learning kit for Arduino category](https://forum.sunfounder.com/t/about-the-learning-kit-for-arduino-category/18)
**Author:** [@SunFounder\_Moderator](https://forum.sunfounder.com/u/SunFounder_Moderator)\ **Replies:** 0
Post here about your Arduino projects, and get help-for Sunfounder customers. --- ## [Problem following process to return to default firmware](https://forum.sunfounder.com/t/problem-following-process-to-return-to-default-firmware/4916)
**Author:** [@Rob1](https://forum.sunfounder.com/u/Rob1)\ **Replies:** 1\ **Last updated:** [August 11, 2026, 1:20am UTC](https://forum.sunfounder.com/t/problem-following-process-to-return-to-default-firmware/4916 "2026-08-11T01:20:07Z")
Hi, I am attempting to follow the tutorial to reflash the default firmware (as found in the FAQ). When I run the “update-arduino-firmware” batch file, I see the following: \>\> Update Arduino Firmware firmware: “zeus-… --- ## [What email can we use to send Paul McWhorter our Arduino homework?](https://forum.sunfounder.com/t/what-email-can-we-use-to-send-paul-mcwhorter-our-arduino-homework/4479)
**Author:** [@dan.werner3319](https://forum.sunfounder.com/u/dan.werner3319)\ **Replies:** 1\ **Last updated:** [March 17, 2026, 7:03am UTC](https://forum.sunfounder.com/t/what-email-can-we-use-to-send-paul-mcwhorter-our-arduino-homework/4479 "2026-03-17T07:03:51Z")
What email can we use to send Paul McWhorter our Arduino homework? --- ## [My Arduino board LED starts blinking when I plugged into the port. Is that normal?](https://forum.sunfounder.com/t/my-arduino-board-led-starts-blinking-when-i-plugged-into-the-port-is-that-normal/4416)
**Author:** [@ALLENRPH](https://forum.sunfounder.com/u/ALLENRPH)\ **Replies:** 1\ **Last updated:** [February 24, 2026, 11:04pm UTC](https://forum.sunfounder.com/t/my-arduino-board-led-starts-blinking-when-i-plugged-into-the-port-is-that-normal/4416 "2026-02-24T23:04:57Z")
My Arduino board LED starts blinking when I pluggeed into the port. --- ## [Trying to reset too the play mode on the Galaxy RVR](https://forum.sunfounder.com/t/trying-to-reset-too-the-play-mode-on-the-galaxy-rvr/4043)
**Author:** [@ArronRLeever](https://forum.sunfounder.com/u/ArronRLeever)\ **Replies:** 1\ **Last updated:** [November 21, 2025, 3:53am UTC](https://forum.sunfounder.com/t/trying-to-reset-too-the-play-mode-on-the-galaxy-rvr/4043 "2025-11-21T03:53:03Z")
Hello, I’m new here and bought the galaxy RVR. I had fun playing with it in the play mode and decided to move onto the lessons for coding after a few lessons I wanted to reset it back to the play mode too bring into my c… --- ## [Need Help Finding Documentation For an Old Kit](https://forum.sunfounder.com/t/need-help-finding-documentation-for-an-old-kit/3930)
**Author:** [@john.hammons](https://forum.sunfounder.com/u/john.hammons)\ **Replies:** 4\ **Last updated:** [October 22, 2025, 6:31am UTC](https://forum.sunfounder.com/t/need-help-finding-documentation-for-an-old-kit/3930 "2025-10-22T06:31:01Z")
Hello. I’m a teacher and I have several of these older (15 years perhaps?) Sunfounder Smartcar for Arduino kits and they have never been used. They were leftover from a previous teacher that is retired. The packaging was… --- ## [ESP32 Dev Board Micro-SD issue](https://forum.sunfounder.com/t/esp32-dev-board-micro-sd-issue/3905)
**Author:** [@XC\_Dev](https://forum.sunfounder.com/u/XC_Dev)\ **Replies:** 3\ **Last updated:** [October 20, 2025, 4:00am UTC](https://forum.sunfounder.com/t/esp32-dev-board-micro-sd-issue/3905 "2025-10-20T04:00:08Z")
The demo code to read and write a test file to the SD card works fine, however, as soon as I connect anything else to the dev board, it fails to init the sd card. For example - a DS18B20 temperature sensor connected to … --- ## [ESP32 Starter kit and I2C voltage levels](https://forum.sunfounder.com/t/esp32-starter-kit-and-i2c-voltage-levels/3902)
**Author:** [@Grphon3rd](https://forum.sunfounder.com/u/Grphon3rd)\ **Replies:** 3\ **Last updated:** [October 17, 2025, 6:48am UTC](https://forum.sunfounder.com/t/esp32-starter-kit-and-i2c-voltage-levels/3902 "2025-10-17T06:48:23Z")
Please forgive a newbie question… I purchased the ESP32 starter kit and am having fun. I am a little concerned about the include LED display however. It requires 5V on the VCC pin, but the ESP32 is not 5V tolerant. do… --- ## [Damaged Component?](https://forum.sunfounder.com/t/damaged-component/3509)
**Author:** [@Anxy](https://forum.sunfounder.com/u/Anxy)\ **Replies:** 1\ **Last updated:** [July 15, 2025, 3:28am UTC](https://forum.sunfounder.com/t/damaged-component/3509 "2025-07-15T03:28:41Z")
I don’t think this component is supposed to look all twisted and bent like this. It appears they try to shove way too many components in a small plastic box and some components were bent. The others I was able to bend ba… --- ## [Use MAX30205 CODE](https://forum.sunfounder.com/t/use-max30205-code/3125)
**Author:** [@john199807](https://forum.sunfounder.com/u/john199807)\ **Replies:** 0\ **Last updated:** [April 28, 2025, 2:13pm UTC](https://forum.sunfounder.com/t/use-max30205-code/3125 "2025-04-28T14:13:29Z")
Please give me a code for MAX30205 --- ## [DC motor in Arduino UNO R4 kit current to high!](https://forum.sunfounder.com/t/dc-motor-in-arduino-uno-r4-kit-current-to-high/3093)
**Author:** [@paks](https://forum.sunfounder.com/u/paks)\ **Replies:** 1\ **Last updated:** [April 24, 2025, 10:51am UTC](https://forum.sunfounder.com/t/dc-motor-in-arduino-uno-r4-kit-current-to-high/3093 "2025-04-24T10:51:45Z")
Hi! I bought the Elite explorer kit for Arduino UNO R4 WIFI, and I find that the DC motor in it commands a 2,1 A @ 5Vdc I think it’s a little high for this type of motor. At the same physical size I have one that takes 1… --- ## [Geting an avr/io.h error message while compiling with the R4 WIFI](https://forum.sunfounder.com/t/geting-an-avr-io-h-error-message-while-compiling-with-the-r4-wifi/2980)
**Author:** [@paks](https://forum.sunfounder.com/u/paks)\ **Replies:** 3\ **Last updated:** [April 8, 2025, 2:03am UTC](https://forum.sunfounder.com/t/geting-an-avr-io-h-error-message-while-compiling-with-the-r4-wifi/2980 "2025-04-08T02:03:25Z")
I have an R4 WIFI Arduino, and while trying to work with the SSD 1306 I keep getting an avr/io.h with the #include wire.h etc, how can I fix that? --- ## [3in1-kit IoT Car](https://forum.sunfounder.com/t/3in1-kit-iot-car/2954)
**Author:** [@Shaslaro](https://forum.sunfounder.com/u/Shaslaro)\ **Replies:** 3\ **Last updated:** [April 1, 2025, 6:47am UTC](https://forum.sunfounder.com/t/3in1-kit-iot-car/2954 "2025-04-01T06:47:42Z")
Good day. I assembled a car with phone control, and loaded the program from the manual. But my ESP8266 transmitter constantly turns off after the car makes one or two movements :frowning: It reboots itself and reconnec… --- ## [Using Pironman 5 for hosting the Arduino IDE](https://forum.sunfounder.com/t/using-pironman-5-for-hosting-the-arduino-ide/2921)
**Author:** [@MarkEdwardHendricks](https://forum.sunfounder.com/u/MarkEdwardHendricks)\ **Replies:** 7\ **Last updated:** [March 26, 2025, 5:14am UTC](https://forum.sunfounder.com/t/using-pironman-5-for-hosting-the-arduino-ide/2921 "2025-03-26T05:14:42Z")
From what I have found, it is entirely possible to use the Pironman5 as a host for the Arduino IDE. However, I have hit a glitch. I found information that states that after downloading the IDE package \ **Author:** [@Lukas](https://forum.sunfounder.com/u/Lukas)\ **Replies:** 1\ **Last updated:** [March 24, 2025, 5:09am UTC](https://forum.sunfounder.com/t/pictoblox-when-esp32-starts-up-greyed-out/2898 "2025-03-24T05:09:12Z") Hi, I a trying to set up PictoBlox for the first time. I can see the board is connected via COM4, I have uploaded firmware successfully but my block “when ESP32 starts up” is greyed out and I can’t drag it into the code. … --- ## [Custom video streaming web server project - no output on serial monitor](https://forum.sunfounder.com/t/custom-video-streaming-web-server-project-no-output-on-serial-monitor/2628)
**Author:** [@pelso69](https://forum.sunfounder.com/u/pelso69)\ **Replies:** 8\ **Last updated:** [February 20, 2025, 3:29pm UTC](https://forum.sunfounder.com/t/custom-video-streaming-web-server-project-no-output-on-serial-monitor/2628 "2025-02-20T15:29:27Z")
Hi - I have just tried to use the project “iot\_3\_html\_cam\_led” in the StarterKit. I uploaded the sketch successfully, after adding my SSID and Password and ensuring the baud rate is set correctly, but I get no output on … --- ## [Uploading Code Issues on SunFounder RVR](https://forum.sunfounder.com/t/uploading-code-issues-on-sunfounder-rvr/1933)
**Author:** [@Wilcox](https://forum.sunfounder.com/u/Wilcox)\ **Replies:** 6\ **Last updated:** [November 12, 2024, 1:50am UTC](https://forum.sunfounder.com/t/uploading-code-issues-on-sunfounder-rvr/1933 "2024-11-12T01:50:54Z")
Good Day All, I am new to all this. I had a great time building the RVR. I uploaded the 5\_car\_move code and had no problem getting the code to run. Here is my problem, for some reason, I cannot upload anymore code to t… --- ## [EC-Block Analog Kit](https://forum.sunfounder.com/t/ec-block-analog-kit/1481)
**Author:** [@Anton](https://forum.sunfounder.com/u/Anton)\ **Replies:** 1\ **Last updated:** [August 13, 2024, 4:06pm UTC](https://forum.sunfounder.com/t/ec-block-analog-kit/1481 "2024-08-13T16:06:55Z")
Hi all! I have an old EC-Block Analog Kit (5+ years old), which I’m going to give to my kid for education. I’ve managed to do all schemes from the paper tutorial, and the missing part are the examples how to use the Leo… --- ## [Compilation error: ‘ledcSetup’ was not declared in this scope](https://forum.sunfounder.com/t/compilation-error-ledcsetup-was-not-declared-in-this-scope/1383)
**Author:** [@IAN](https://forum.sunfounder.com/u/IAN)\ **Replies:** 1\ **Last updated:** [August 13, 2024, 3:55pm UTC](https://forum.sunfounder.com/t/compilation-error-ledcsetup-was-not-declared-in-this-scope/1383 "2024-08-13T15:55:19Z")
I’m working through the ESP32 starter kit and it TUTs this is only the 2nd TUT 2.2 fading LED and i can not get past this. I’ve followed all the steps repeatedly and this keeps happening. C:\\Users\\tymed\\OneDrive\\Docum… --- ## [First time user \> totally lost](https://forum.sunfounder.com/t/first-time-user-totally-lost/1468)
**Author:** [@0ldernu](https://forum.sunfounder.com/u/0ldernu)\ **Replies:** 6\ **Last updated:** [August 12, 2024, 12:51pm UTC](https://forum.sunfounder.com/t/first-time-user-totally-lost/1468 "2024-08-12T12:51:17Z")
I’m following the YouTube video’s. The first video suggests that using ide 2.2.1 is important to avoid problems. Can’t find where or how to download ide 2.2.1. So now i’m trying to use ide 2.3.2. With this setup the “… --- ## [3in1-kit-v2 assembly instruction wrong](https://forum.sunfounder.com/t/3in1-kit-v2-assembly-instruction-wrong/1261)
**Author:** [@mycstar](https://forum.sunfounder.com/u/mycstar)\ **Replies:** 1\ **Last updated:** [June 21, 2024, 7:59am UTC](https://forum.sunfounder.com/t/3in1-kit-v2-assembly-instruction-wrong/1261 "2024-06-21T07:59:21Z")
on page of Assemble the Car — SunFounder 3in1 Kit documentation, steps of 6 and 7 the standoff should be M3x10mm. you can’t find M3x10mm standoff. --- ## [ESP32 Dev board battery level](https://forum.sunfounder.com/t/esp32-dev-board-battery-level/1131)
**Author:** [@beka\_master](https://forum.sunfounder.com/u/beka_master)\ **Replies:** 1\ **Last updated:** [May 23, 2024, 2:38am UTC](https://forum.sunfounder.com/t/esp32-dev-board-battery-level/1131 "2024-05-23T02:38:50Z")
Hello, I’m using the ESP32 Dev board included in the ESP32 Starter Kit to create a custom gamepad, since I’m using the Bluetooth connection I want to send the battery level to the paired device via command bleGamepad.se…