I created a PCB to read data from my MPPT charging controller and it having RS232 communication. I'm using ESP 8266 and MAX232 CPE IC (To create RS232 converter). i input 5V to the MAX232 IC and connected it TX RX to ESP8266 RX TX, PCB is currently working and communication between the MPPT device a…

Can MAX232 powered at 5V and connect to tx rx(TTL) on ESP8266

sterretje September 10, 2021, 5:09pm 6

The RS232 side will not be a problem; typical RS232 output level +/- 8V, maximum RS232 input level +/-30V.

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