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An overview video of version 3 of my contact sensor.
Get 10 PCBs for $5 USD at www.pcbway.com
Buy the Contact Sensor - store.mrdiy.ca/p/wireless-con...
Source code and schematics - gitlab.com/MrDIYca/ultra-low-...
This door and window sensor is built using an ESP8266, ATtiny13a, LDO and a Lithium battery charge controller.
Shopping for the battery charger IC?
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■ Amazon - geni.us/p6E6
■ AliExpress - s.click.aliexpress.com/e/_AmZsJT
My Contact Sensor System Playlist - • My Ultra Low Power Sen...
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