Any RTC chip known to work with ESP32 cam ?

FBMinis
Posts: 15
Joined: Sun Jan 17, 2021 1:08 pm

Re: Any RTC chip known to work with ESP32 cam ?

Postby FBMinis » Sat Mar 20, 2021 6:35 pm

Sorry for the late reply, I had notifications OFF for some reason...

Not sure you asked for photos of the assembly or photos taken by it, so here's both.

I changed the code, now I'm using Async Telegram Library which allows me to send photos in UXGA without problems.

https://github.com/FBMinis/DS3231-Alarm ... legram-Bot

sionut
Posts: 8
Joined: Tue Oct 06, 2020 10:23 am

Re: Any RTC chip known to work with ESP32 cam ?

Postby sionut » Wed Mar 24, 2021 3:23 pm

Thank you for your reply !

Actually I wanted to see a (close-up) picture of the board after your modifications.

You said that "but after removing some components I got 3uA".

FBMinis
Posts: 15
Joined: Sun Jan 17, 2021 1:08 pm

Re: Any RTC chip known to work with ESP32 cam ?

Postby FBMinis » Wed Sep 29, 2021 10:45 pm

Only the DS3231 chip is needed, plus two 10k pull-up resistors for SDA and SCL, and the CR2032 cell. When an alarm is set and SQW is HIGH, the P-Channel Mosfet is open and the device is off, the quiescent current is very low which allows for 5 days of a photo being sent to Telegram every 2min.

There is still much room for improvement.

Example timelapse:
https://www.youtube.com/watch?v=Bjpfm8ItYG8
https://youtu.be/A17ffdFiMxg
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FBMinis
Posts: 15
Joined: Sun Jan 17, 2021 1:08 pm

Re: Any RTC chip known to work with ESP32 cam ?

Postby FBMinis » Wed Sep 29, 2021 10:46 pm

Two more photos of the DS3231 module:
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