Inspired by Weatherman Dashboard for ESPHome.
Based on my previous project esp8266-epaper
- VERY low power consumption (22.5uA during the sleep phase)
- bless-based BLE server fetching the altest data from Home Assistant and exposing it as BLE Characteristics
- Auto-refresh current weather and HA sensor data via BLE
- 🔋 Voltage Indicator
- Seeed Studio XIAO nRF52840 [link] (https://www.seeedstudio.com/Seeed-XIAO-BLE-nRF52840-p-5201.html)
- Waveshare 13187 7.5inch e-Paper link
- aveshare e-Paper Driver HAT Rev2.3 link
- IKEA Ribba frame link
- 2500mAH Lithium-Polymer battery link
// MCU: Xiao Nrf52840 Sense
// Driver: Waveshare e-Paper Driver HAT Rev2.3
// SIGNAL color NAME PIN PORT
// -------------------------------------------
// BUSY Purple D3 4 P0.29
// RST White D4 (SDA) 5 P0.05
// DC Green D5 (SCL) 6 P0.04
// CS Orange D7 (RXD) 8 P1.12
// CLK Yellow D8 (SCLK) 9 P1.13
// DIN BLUE D10 (MOSI) 11 P1.15
// GND BROWN GND 13
// VCC GRAY 3V3 12
// PWR RED D0 0 P0.02
ArduinoGxEPD2for controllling and drawing on the ePaperArduinoJsonfor decoding the response from Home Assistant- fonctconvert from AdafruitGFX to convert fonts to header files
rsvg-convertto convert Material Icons svg to png (withfind . -type f -name "*.svg" -exec bash -c 'rsvg-convert -h 512 "$0" > "$0".png' {} \;)- image2cpp for converting the created png files to header files with bitmaps
- Get latest bootloader from here (i.e., update-xiao_nrf52840_ble_bootloader-0.8.3_nosd.uf2) and copy file onto MCU. Very important to get the low power consumption working!
- TODO (platformio setup, HA configuration, systemd service for epaper BLE service)
- https://wiki.seeedstudio.com/XIAO_BLE/
- https://infocenter.nordicsemi.com/pdf/nRF52840_PS_v1.7.pdf
- https://forum.seeedstudio.com/t/getting-lower-power-consumption-on-seeed-xiao-nrf52840/270129
- adafruit/Adafruit_nRF52_Arduino#743
- platformio/platform-nordicnrf52#151
- https://forums.adafruit.com/viewtopic.php?t=128823
- https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases
- https://files.waveshare.com/upload/4/4e/2.13inch_e-Paper_V4_Specification.pdf