E-Paper (2.9") solar box

thingiverse

Human: A specially designed enclosure houses a 2.9-inch e-ink display from Waveshare, which is powered by two small solar panels that harness energy from the sun. I'm using it to showcase the output from my rooftop solar panels in real-time. To power this setup, a NodeMCU ESP8266 board is connected to a 18650 3.7V Li-ion battery, which is charged by the two solar panels on the enclosure. The circuit diagram provides a detailed overview of the entire system. Although the connection to the display is not explicitly mentioned, I used the following connections: Busy --> D2 RST --> D4 DC --> D3 CS --> D8 CLK --> D5 DIN --> D7 VCC --> VCC GND --> GND The ESP8266 board is in deep-sleep mode to conserve energy, waking up at regular intervals to update the display with fresh information. Here's a list of parts used: 2.9-inch display (Three-color): goo.gl/3dzN7N NodeMCU: goo.gl/nDuAkv Solar panels 6V: goo.gl/6mY89d TP4056 Charge protection board: goo.gl/a9wdzB 1 x 18650 3.7V Li-ion battery. 3 diodes. Note: I've observed a significant difference in power consumption during deep-sleep mode among various NodeMCU boards from different sellers, with some using up to 200 times more energy than the most efficient ones.