My new development: a mini temperature and humidity sensor with an electronic ink display(ver. nRF52832). Very low power consumption! The prototype is ready, software is testing, the energy consumption tests have been successfully passed. 


- nRF52810, nRF52811, nRF52832, nRF52840
- SHT20, SHT21, SI7020, Si7021
- 1.54 e-paper display
- LED SIDE 1206
- Combo interface 6P SWD Serial (micro, 3х2/1,27)
- Step down converter (optional)
- One or Two batterys CR2430, CR2450 or CR2477 
- Two side buttons (first button-reset, the second button - custom.


Very easy to program in Arduino IDE.

**A great device for learning nRF52.**

I have these devices planned as control devices for heating batteries in every room of my house.


![enter image description here](https://www.openhardware.io//uploads/5b9f6e73d376570b051a9227/image/222.png "enter image title here")




Code for Arduino IDE - https://drive.google.com/file/d/13wmxCt9XehJr1E2eyG1RnYsQTMb9A2LR/view?usp=sharing

(This is a test code that needs to be improved, some functions may not be needed(proposed by NeverDie), something must be transferred from the code to the library. But nevertheless this code is absolutely working. The consumption of the device is minimal. Do not use the standard sleep function from the display library.)

![enter image description here](https://www.openhardware.io//uploads/5b9f6e73d376570b051a9227/image/12.png "enter image title here")


**List of components that are present at the sensor:**

- PCB 2 pcs.


- SW1, SW2 Buttons clocks cm 2 pcs.
- J5 Connector 2x3 P6 1.27mm 1 pcs.
- C1, C7, C13, C15, Condenser 100NF X7R 10% 50V 0603 4 pcs.
- NRF52832, YJ-16048 1 pcs.
- 200x200, 1.54inch E-Ink raw display 1 pcs.
- D1, LED SIDE SMD 1204 (2012) 1 pcs.
- U5, FPC Pitch 0.5mm 24 pins 1 pcs.
- L1, CD43 SMD Power Inductor 68uh 1 pcs.
- U4, SI1304BDL N-Channel 30 V (D-S) MOSFET 1 pcs.
- U2, U3, U6, MBR0530 Schottky Power Rectifier 3 pcs.
- C2, C3, C4, C5, C6, C8, C9, C10, C11, Condenser 1UF X5R 10% 16V 0603 9 pcs.
- C14, Condenser 10uf 10v 0805 1 pcs.
- R7, Resistors 24K 1% 0805 1 pcs.
- R5, R6, Resistors 4,7K 1% 0805 2 pcs.
- R3, R4, Resistors 10K 1% 0805 3 pcs.
- R1, Resistors 1K 1% 0805 1 pcs.
- R2, Resistors 3R0 1% 0805 1 pcs.
- J1, J2, J3, J4, 2.54mm Connectors Header 4 pcs.
- U1, SHT20 Temperature And Humidity Sensor 1 pcs.


- U1, U3 Battery holder 2 pcs.
- TPS62745DSSR1, TPS62745DSSR 1 pcs.
- C2, Condenser 10uf 25v 1206 XTR7 1 pcs.
- C1, Condenser 10uf 16v 1206 XTR5 1 pcs.
- L1, Inductance 4.7uh 1210
- U2, Micro Slide Toggle Switch 1P2T 1 pcs.
- R2, Resistors 1M 1% 0805  1 pcs.
- R1, Resistors 160K 1% 0805 1 pcs.




...I hope this development will deserve your like