ESP 8266 Wi-Fi Repeater with Mesh Networking

Re:ESP 8266 Wi-Fi Repeater with Mesh Networking by fest on Tuesday December 26, 2017 @11:02AM (#16009140)

Coin cells are not an option- it consumes around 200-300mA while actively transmitting, and around 10uA in (one of) sleep modes. I'm powering my custom temperature/humidity sensors with 18650 lithium batteries. I'm getting around 3-4 months of battery life with 3000mA batteries (waking up every 15 minutes to make a reading, associate with AP and transmit data to local influxdb server (which also runs Home Assistant to see the readings and control some AC outlets).

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Re:ESP 8266 Wi-Fi Repeater with Mesh Networking by bilkow on Tuesday December 26, 2017 @11:33AM (#16009291)

It may be an option if using (super)capacitors and only transmitting / receiving for a short fraction of time.

https://hackaday.io/project/28527-solved-esp8266-powered-by-...

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Re:ESP 8266 Wi-Fi Repeater with Mesh Networking by fest on Wednesday December 27, 2017 @04:44PM (#16018296)

I stand corrected. By combining that with low-leakage wakeup timer ICs and low-leakage supercap, one could indeed design a device that runs for months on a single coin cell (transmitting every few hours).

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Re:ESP 8266 Wi-Fi Repeater with Mesh Networking by Kelbit on Tuesday December 26, 2017 @07:15PM (#16011905)

Do make sure to check the leakage specs on a supercap, though. They tend to have pretty high leakage current, which may clobber your power budget in low duty cycle applications.

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Re:ESP 8266 Wi-Fi Repeater with Mesh Networking by paulie_a on Tuesday December 26, 2017 @04:58PM (#16011307)

Is your project open source. I've been wanting to build that exact sensor network for a hunidor

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Re:ESP 8266 Wi-Fi Repeater with Mesh Networking by fest on Wednesday December 27, 2017 @04:28PM (#16018182)

It is now: https://github.com/festlv/esp32-temperature-humidity-sensor

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