SH-201_Smart solar power meter

3.2-inch large screen voltage and ammeter

Q group 565264047 Welcome to play~

If you need cooperation, please contact the email root@an-ye.top

For burning, you need to use " Cube-101_esp-tool burning and debugging tool ", and insert it into the TYPE-C port forward, as shown in the picture above

Code open source repository: https://github.com/panyihang/SH-201_power-moniter

Being updated, the code is not perfect yet, though. . . It’s not that it can’t be used (everyone is welcome to suggest PR)

0x00: Preface

Bilibili's "Low-Cost Home Power Station" series has officially begun to fill in the gaps. Sorry, it's been a long time ago.

0x01:Update instructions

"2022.06.23 Ver0.2" Modify the LED power supply. The original solution has insufficient current. Adjust the wiring and modify the RP2040 package.

"2022.07.08 Ver0.3" Replace the MCU and use ESP32S2

0x02: Hardware part

• Main control MCU: ESP32S2
• INA199 current sensor
• AHT21 temperature and humidity sensor
• TFT8K2798 screen, the display effect is OK
• Magnetic suction on the back, easy to fix on the wall (requires wall support) ps: Tutorial on magnetic suction on the wall is on the back

0x03: Software part

• System: Arch Linux
• Development environment: Esp-idf 4.3
  
• Display frame: LVGL7.2 (modified underlying functions, not universal)
• Based on Espressif's official porting project lv_port_esp32

0x04: Compilation/development/burning instructions

0x05: How to build a wall that supports magnetic suction (ultra-low-cost version)

The Fe3O4 powder magnetic area is black and gray and cannot be changed.

Fe powder looks just a little yellowish, and the original color can basically be seen, but it is not recommended to use in the humid south.

First, prepare 100g of interior wall latex paint of any color (1000g costs about 8 yuan, don’t buy too much, you won’t be able to use up...)

Then you need an appropriate amount of Fe3O4 powder, 325 mesh and below is enough (50g is about 4 yuan)

Mix together and stir until smooth

Finally, start applying it to the wall, remember to apply it several times more

Be sure to define areas with textured paper to prevent ragged borders. . .