Table 2. Average and standard deviation of time taken for message to traverse given path segment (n = 12).

The message path is graphically illustrated in Fig. 4A.

Segment	Description	Mean [ms]	STD [ms]
1*	Message sent from python GUI to ESP32-A via USB serial connection.	29.8	–
2	ESP32-A recieves message via USB serial connection (pin set to high) and then echoes message to ESP-B via ESP-NOW (pin set to low).	20.0	0.0012
3	Message is sent from ESP32-A to ESP32-B via ESP-NOW.	2.01	0.819
4	ESP32-B recieves message from ESP32-A via ESP-NOW (pin set to high) and then echoes message to RS485 via serial connection (pin set to low).	1.56	0.361
5	RS485 recieves message from ESP32-B via serial connection and transmits converted message to VEX V5 microprocessor.	34.5	11.4
6	VEX V5 microprocessor recieves message, processes response, and sends reply to RS485.	19.9	0.0105
7	RS485 recieves message from VEX V5 microprocessor and transmits converted message to ESP32-A via serial connection.	4.46	2.24
8	ESP32-B recieves message from RS485 via serial connection (pin set to high) and echoes message to ESP32-A via ESP-NOW (pin set to low).	20.1	0.004
9	Message is sent from ESP32-B to ESP32-A via ESP-NOW.	3.19	0.663
10	ESP32-A recieves message via ESP-NOW (pin set to high) and then echoes message to python GUI via USB serial connection (pin set to low).	21.7	0.0037
11*	Message sent from ESP32-A to python GUI via USB serial connection.	29.8	–

Note:

^*The time for segments 1 and 11 was computed by subtracting the average total time for segments 2 through 10 from the roundtrip time and dividing by 2.