M5Stamp power function

I connected my M5Stamp to a small H-Bridge made with L298 compatible chip, small enough to fit inside a Lego Power Function IR receiver shell. The bridge is powered from the battery pack at 9V, while an AMS1117-3.3 provides the to 3.3V compatible with the M5stamp. Since I'm not using 5V in any place, I'm not providing this voltage to the board.

The pin selected for output and connected to the IN pins of the chip L298 are:

• G26
• G18
• G19
• G21

I skipped G36 because that pin can work only as Input

After connected everything, I put the board inside the shell. Unfortunately, the LED and the G39 Button are not accessible from the front.

Software

After installed the latest version of UIFlow (Pico) from M5Burner, I was able to connect to the chip from my preferred web tool.

I use UIFlow on M5stamp because it's so easy and doesn't require USB adapters after burning initially the chip.

Tests

On test one, I just changed the color of the LED, to verify connectivity to UIFlow.

The second test involve the motors, and just powering them for 1 second to check if everything works as expected, and it did. On the third test, I configured 2 PWM, to verify the capabilities of controlling the speed. Now that everything works properly, I have the full flexibility of installing anything via Arduino or UIFlow, I prefer the second one as it doesn't require any USB to serial adapter.