Search found 2 matches

by Warlib
Sun May 02, 2021 4:06 am
Forum: Hardware
Topic: RTC of ESP32-WROOM-32E
Replies: 1
Views: 2895

RTC of ESP32-WROOM-32E

I would like to understand is it a way to power internal RTC from the battery (e.g. CR2032) on the new ESP32-WROOM-32E, to guarantee that internal RTC will work if 220V power is down? It's a pity that we must use an additional RTC chip and external crystal clock while ESP32-WROOM-32E already has the...
by Warlib
Thu Feb 21, 2019 1:04 pm
Forum: ESP32 Arduino
Topic: ESP32 RS485driver hardwareserial ModbusMaster
Replies: 23
Views: 49261

Re: ESP32 RS485driver hardwareserial ModbusMaster

Hi, colleagues,

I made a review on how to use MAX3485 based board with HardwareSerial on the ESP32. Here it is http://www.bizkit.ru/en/2019/02/11/12251/
RS485 board base on MAX485 works perfect with the ESP32.