The project is closed. See the continuation of this development in the new project - https://www.openhardware.io/view/629/EFEKTA-TempandHum-sensorver-nRF52832-E-Ink-display

My new development: a mini temperature and humidity sensor with an electronic ink display. Very low power consumption! Now the development is at the stage of development of the case. The prototype is ready, software is ready, the energy consumption tests have been successfully passed. Estimated time of operation is 3 years(maybe longer). This sensor can also work in master-slave mode with with my other devices

• ATMEGA328
• SHT20
• 1.54 e-paper display
• AT25DF512B
• ATSHA204A
• NRF24L01
• Сrystal oscillator( for DYI)
• LED SIDE 1206
• ICSP interface (micro, 3х2/1,27)
• FTDI interface (micro, 3х2/1,27)
• Two or three cr2430 (6v or 9v 300mA)
• Two side buttons (first button-reset, the second button - interrupt (DIY), in my implementation it's search the network, bind to the wizard, remove the master-slave connection, full reset of the device)

Works with all bootloaders

MySensors inside :)

...watch for updates

...I hope this development will deserve your like