B-G431B-ESC1: Beginner guide + I2C guide

hardware support
2

Hi all,

I2C Guide

This small update is for getting the I2C working on the B-G431B-ESC1. It is still a bit experimental and sometimes buggy so I will update it again when necessary.

Hardware:

Solder the following pads:

Hardware
Hardware947×863 193 KB

It is recommended to use pull-up resistors.

Software:

In the file PeripheralPins.C, uncomment the following lines:

Uncomment
Uncomment797×479 10.7 KB

In the file Variant.h, change or add following lines (sometimes also works when you leave out this step but this seems to be more consistent.

Add
Add788×549 12.3 KB

Then in your platformio.ini file you must remove the build flags from the previous post and the following flags:

build_flags =
    -D PIN_WIRE_SDA=PB7
    -D PIN_WIRE_SCL=PB8

Other tips:

  • Use the Platform.IO: Clean button to be sure that you are working with a clean configuration.
  • Sometimes it can be useful to add the build flags from the previous post.
  • Sometimes it can be useful to add Wire.setClock(400000);.
  • First add power to the board, then connect it with USB.
  • Remove power when uploading new sketch.
  • To get accurate sensor data, check with external power supply instead of USB power.

Greetings and good luck,

Wittecactus

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