I have gotten to the point of needing to expand my mesh network capabilities. My first thought was to at a third mesh node, but I don’t yet have an elegant hardware solution yet. I could solder up some wires to an ESP module and reprogram it every time by reconnecting wires. However, there are other ways I could develop the project while I think of a better solution. I think I will begin working on two way communication first, and maybe even start trying out some ULP core libraries.

At first, I will connect a second sensor for the second stream of data. I chose the ultrasonic distance sensor, however, while testing it, it appeared to be broken. The echo pin should respond to the 10 microsecond trigger but it stayed high all the time.

Fig. 22 - Five Wire logic capture of the Trig and Echo pins.