This guy gets the best battery numbers. His ESP32 “Trig Board” spends its time off and is triggered on (by a RTC or sensor) sends a message, then turns off.
https://www.tindie.com/products/kdcircu ... -platform/
Search found 50 matches
- Wed Feb 03, 2021 12:50 pm
- Forum: General Discussion
- Topic: BLE low power status
- Replies: 8
- Views: 6132
- Sat Jan 23, 2021 12:50 pm
- Forum: General Discussion
- Topic: ESP32 was ahead of its time
- Replies: 3
- Views: 534
ESP32 was ahead of its time
The internet is buzzing over some new silicon in a MCU from the Raspberry Pi foundation.
But this only emphasizes how far ahead the ESP32 was years ago. And may still be. Really. The M0+
Not perfect. The ADC and in-circuit debugging are troublesome.
But it has a radio in it!

But this only emphasizes how far ahead the ESP32 was years ago. And may still be. Really. The M0+
Not perfect. The ADC and in-circuit debugging are troublesome.
But it has a radio in it!

- Wed Jan 20, 2021 1:11 pm
- Forum: General Discussion
- Topic: Get BLE UUID for iOS pairing
- Replies: 12
- Views: 6417
Re: Get BLE UUID for iOS pairing
Probably not. The point is how it was derived is unknowable and probably not deterministic.So, as per my understanding, that UUID is generated by iOS based on some hardware property of the BLE device (e.g. MAC address).
- Sat Jan 16, 2021 12:41 pm
- Forum: General Discussion
- Topic: Get BLE UUID for iOS pairing
- Replies: 12
- Views: 6417
Re: Get BLE UUID for iOS pairing
16 bit UUIDs are standardized and published by the Bluetooth SIG. So they are known before-hand. They deal with measurements of health, time, temperatures, velocity, etc. Standard stuff useful for everybody. Nobody could publish all the 32-bit UUIDs. There are more of them than there are stars in th...
- Thu Jan 14, 2021 1:20 pm
- Forum: General Discussion
- Topic: Building on Mac OS Big Sur
- Replies: 2
- Views: 421
Re: Building on Mac OS Big Sur
OSX Catalina was the last version I got to work.
Big Sur is locked down to the point of being pretty useless for our tool chains/apps.
I Dual boot.
Big Sur is locked down to the point of being pretty useless for our tool chains/apps.
I Dual boot.
- Sat Jan 09, 2021 9:02 pm
- Forum: ESP32 Arduino
- Topic: Reducing memory usage when using BLE
- Replies: 4
- Views: 670
Re: Reducing memory usage when using BLE
Ooooops.
Some Callback processing causes a crash.
Stack size somewhere in Arduino version needs increasing I guess.
The troubleshooting costs might exceed the benefits.

Some Callback processing causes a crash.
Stack size somewhere in Arduino version needs increasing I guess.
The troubleshooting costs might exceed the benefits.

- Sat Jan 09, 2021 5:01 pm
- Forum: ESP32 Arduino
- Topic: Reducing memory usage when using BLE
- Replies: 4
- Views: 670
Re: Reducing memory usage when using BLE
Thanks. I completely missed NimBLE. I saved about 6% program memory. Using BlueDroid Sketch uses 1095047 bytes (16%) of program storage space. Maximum is 6553600 bytes. NimBLE Sketch uses 656243 bytes (10%) of program storage space. Maximum is 6553600 bytes. Notes: If you are using the Arduino re-fa...
- Fri Jan 01, 2021 12:13 pm
- Forum: General Discussion
- Topic: ESP32S2
- Replies: 5
- Views: 843
Re: ESP32S2
A google search turned up this 90+ projects summary.
I haven’t verified everything but I think they have a good reputation.
https://randomnerdtutorials.com/projects-esp32/
I haven’t verified everything but I think they have a good reputation.
https://randomnerdtutorials.com/projects-esp32/
- Sat Oct 31, 2020 10:53 am
- Forum: Showcase
- Topic: ESP32-S2 ESP32-S3 engineering usb dongle "esp32-sx-stickley"
- Replies: 1
- Views: 23831
Re: ESP32-S2 ESP32-S3 engineering usb dongle "esp32-sx-stickley"
Can’t wait for any news on S3—mini or maxibut also there is the same usb engineering sample to the maker market with an ESP32-S3, which support Wifi and Bluetooth and is based on the ESP32-S3-Mini serie's.

- Sat Aug 22, 2020 11:21 am
- Forum: ESP32 Arduino
- Topic: Best Frequency Meter ever made with ESP32 - awesome!
- Replies: 18
- Views: 4891
Re: Best Frequency Meter ever made with ESP32 - awesome!
Thank you for all your work on this.