. They have the arduino pinout.The R1 and R3 have A0 buttom left .The R2 has A0 + SDA, SCL and GPIo's to Board pins are screwy, so I'd say stay with R1/R3..My WEMOS R1/R3 will support 4 relay Catalex shield directly.I am using I2c LCD using 5 volt and DS3231 using 3.3 ...
Other pins that may need be adapted into code (for example if you use TTN network gateway code) according to the following pinout Please not that to avoid 3 GPIOs for DIO0,DIO1,DIO2 Interrupt, these 3 are OR'ed with 3 diodes, respectively named D2,D3 and D4. This permit to use...