ESP8266 Community Forum

- Mon Sep 28, 2020 6:43 am #88929 I would like to stack a TB6612FNG motor driver (fpr example this one: https://www.sparkfun.com/products/14450 ... 1600694119 ) on top of the the Wemos D1 Mini Pinout.
All outputs of the Wemos (that are inputs to the motor driver) neeed to be on the right side, so they can have direct connect when stacking. The rest of the pins will be disconnected.

But in order for this to work, I need to allocate GPIO1, GPIO3 to be general purpose IOs, and cancel the RT/TX task. This can be done by:

pinMode(led_red, FUNCTION_3); //GPIO 1 swap the pin to a GPIO.
pinMode(led_green, FUNCTION_3); //GPIO 3 swap the pin to a GPIO

My question: can I assign the TX/RX part to other pins? I still want to use the serial.print commend with the USB, for the debug process. Can the serial.print work with out the GPIO1/3 active as TX/RX?

- Mon Sep 28, 2020 3:00 pm #88937 > I still want to use the serial.print commend with the USB, for the debug process.

then no, as the usb/serial converter is wired to these pins ...

- Mon Sep 28, 2020 5:31 pm #88940 If vertical stacking is not of paramount importance you could use a Dual Socket Base Shield for WeMos D1 and modify it to your requirements.

- Tue Sep 29, 2020 12:42 am #88942

If vertical stacking is not of paramount importance you could use a Dual Socket Base Shield for WeMos D1 and modify it to your requirements.

Thanks - although I prefer vertical, this is a good idea. I assume the pins are not connected (i.e left side D1 is not hard wired to right side D1 ?).
If I go with vertical, I benefit with few IOs connect directly, but still have to manipulate others (e.g. connect TX to RX and Rx to Tx), so perhaps the dual board is better.