Programming the IoT Redboard

Development Boards ESP32
1

Im having issues with being able to automatically download to the IoT redboard. The only way I am able to is if i press the reset and program button which manually puts it into programming mode. Doesnt this board have onboard circuitry to do that automaticallly? I am using VScode with PIO

2

It does and the arduino IDE knows how to trigger it.

Sounds like the IDE you’re using doesn’t send a reset to the board at upload.

3

^Like he said; also:

  1. Try using a different USB cable - sometimes cables that work fine for power/serial communication don’t reliably connect the DTR/RTS lines needed for auto-reset

  2. Check your board’s upload_protocol in platformio.ini. For ESP32 boards, it should be:

upload_protocol = esptool
  1. Try explicitly setting the DTR/RTS control in platformio.ini:
upload_flags = 
    --before=default_reset
    --after=hard_reset
  1. Manually set upload speed to 115200 (also in the ini file)
upload_speed = 115200
4

I added everything here beside the upload speed as when I do upload I see that it changes to

Changing baud rate to 460800

im still unable to get it to get it to automatically go into programming mode. Below is my .ini file

[env:sparkfun_esp32_iot_redboard]
platform = espressif32
board = sparkfun_esp32_iot_redboard
framework = arduino
upload_protocol = esptool
lib_deps =
    ottowinter/ESPAsyncWebServer-esphome@^3.3.0
    knolleary/PubSubClient@^2.8
board_build.filesystem = littlefs
upload_flags =
    --before=default_reset
    --after=hard_reset
5

I’d guess it’s probably a setting in PlatformIO that needs to be set, then…or just push the button

6

I’m guessing you don’t have the right driver installed for the USB-UART chip on the board (CH340). I’ve experienced this behavior as well, and resolved it by updating the driver. It’s been a while since I’ve done that, and I recall that some versions of the driver don’t work properly. Try the one on our website, let us know if that works for you!