My new development: two-channel touch mini switch with glass panel on batteries. Now the development is at the stage of software testing. The prototype is ready, power consumption tests have been successfully passed. Estimated operating time with led, which is constantly running 12 months(maybe more | ??? ), no led, only with a buzzer simulating a click of the relay-2-3 years. The height of the gadget is 11 mm, the Board dimensions 42mm x 42mm. This touchpad can work in master slave mode with my other devices

• On Board the device are:
• Glass panel 47mm X 47mm
• Atmega328
• 8MHz crystal oscillator (for DIY)
• tp223
• three-color led
• photoresistor
• nrf24l01
• AT25F512B-SSH-T (flash)
• ATSHA204A_SOT23 (cripto)
• buzzer
• TPS627ХХ family (consumption of 360 nA)
• three cr2430 batteries (9v, 300mA)
• FTDI (micro)
• ICSP (micro)

Works with all bootloaders

...watch for updates

...I hope this development will deserve your like