ESP32-S3, SX1262 LoRA --Ultra Low Power, Wake-on-Radio, and Deep Sleep - Show & Tell https://forum.dronebotworkshop.com/show-tell/esp32-s3-sx1262-lora-ultra-low-power-wake-on-radio-and-deep-sleep/ Discussion board for Robotics, Arduino, Raspberry Pi and other DIY electronics and modules. Join us today! en-US Fri, 17 Apr 2026 11:49:24 +0000 wpForo 60 ESP32-S3, SX1262 LoRA --Ultra Low Power, Wake-on-Radio, and Deep Sleep https://forum.dronebotworkshop.com/show-tell/esp32-s3-sx1262-lora-ultra-low-power-wake-on-radio-and-deep-sleep/#post-51622 Sat, 13 Sep 2025 10:32:17 +0000 Project is a web based, remote load controller. Async web server, receives web request. LoRa transmitter sends two packets in one transmission. First packet is the Wake on Radio preamble, the second packet is the payload; turns on load, calls radio.sleep, sets external wake up timer. Timer expires, turns off load, devices enter sleep; await for cycle to repeat. Original use case was for a Wyze Cam3, power bank switch to conserver battery power. Web request came from website link; the two packets, one transmission keeps the web experience to a single click on the link.

GitHub project  EoRa PI Foundation receiver has 175 µA average current consumption using SX1262 LoRa Duty Cycle and Deep Sleep. Current consumption measurement images; done with Nordic Power Profiler Kit II.

Duty cycle = \~1.4% of the time listening (11 mA spike, lasting 9.91 mS), \~98.6% of the time deep sleep (Baseline current 25.38 µA).

EoRa PI Development Board 

Serial Monitor output with comments 

Project repo ReadME.md  

William, 

]]> Show & Tell AB9NQ-William https://forum.dronebotworkshop.com/show-tell/esp32-s3-sx1262-lora-ultra-low-power-wake-on-radio-and-deep-sleep/#post-51622