https://github.com/nicholaswilde/solar-battery-charger

:battery: A solar battery charger to charge lithium ion (li-ion) 18650, 9V, and coin batteries and Ni-MH AA and AAA batteries. :sunny:
https://github.com/nicholaswilde/solar-battery-charger

adafruit-feather-huzzah charger li-ion-battery solar thingspeak

Last synced: 19 days ago
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:battery: A solar battery charger to charge lithium ion (li-ion) 18650, 9V, and coin batteries and Ni-MH AA and AAA batteries. :sunny:

• Host: GitHub
• URL: https://github.com/nicholaswilde/solar-battery-charger
• Owner: nicholaswilde
• License: apache-2.0
• Created: 2022-01-24T04:51:26.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2023-09-05T11:16:11.000Z (over 1 year ago)
• Last Synced: 2025-02-14T04:39:27.259Z (2 months ago)
• Topics: adafruit-feather-huzzah, charger, li-ion-battery, solar, thingspeak
• Language: C++
• Homepage: https://nicholaswilde.io/solar-battery-charger/
• Size: 79.3 MB
• Stars: 2
• Watchers: 3
• Forks: 0
• Open Issues: 21
• Metadata Files:
  • Readme: docs/README.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE

Awesome Lists containing this project

README

        
# :battery: Solar Battery Charger :sunny:

![GitHub tag (latest SemVer)](https://img.shields.io/github/v/tag/nicholaswilde/solar-battery-charger?style=for-the-badge)

[![ci](https://img.shields.io/github/workflow/status/nicholaswilde/solar-battery-charger/ci?label=ci&style=for-the-badge)](https://github.com/nicholaswilde/solar-battery-charger/actions/workflows/ci.yaml)

[![task](https://img.shields.io/badge/Task-Enabled-brightgreen?style=for-the-badge&logo=data:image/png;base64,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)](https://taskfile.dev/#/)

[![thingspeak](https://img.shields.io/badge/Thingspeak-Enabled-brightgreen?style=for-the-badge&logo=data:image/png;base64,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)](https://thingspeak.com/channels/1642208)

A solar battery charger to charge lithium ion (li-ion) 18650, 9V, and coin batteries and Ni-MH AA and AAA batteries.









---

## :rocket:  TL;DR;

Create [`secrets.h`](https://nicholaswilde.io/solar-battery-charger/configuration/#secrets) and update parameters in `config.h`.

```shell

(

  sudo apt install python3-serial screen

  brew install arduino-cli

  arduino-cli config init

  arduino-cli config add board_manager.additional_urls https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json

  arduino-cli core update-index

  arduino-cli core install esp32:esp32

  arduino-cli lib install ThingSpeak "Adafruit SH110X" "Adafruit INA260 Library" Timezone ESP-Google-Sheet-Client

  arduino-cli compile -b esp32:esp32:featheresp32 .

  arduino-cli upload -b esp32:esp32:featheresp32 . -p /dev/ttyUSB0 .

  screen /dev/ttyUSB0 115200

)

```

## :computer: Output

Mode: recharge

```shell

Mode: recharge

SSID: MySSID

Connecting.........

Connected!

IP: 192.168.1.77

Hostname: Feather

Battery:

 Percentage: 90%

 Voltage: 4.04 V

 Current: 700 mA

 Power: 2.6 W

Channel:

 Number: 1642208

 Status: success

Sleep time: 15m

```

Mode: discharge

```shell

Mode: discharge

Battery:

 Percentage: 90%

 Voltage: 4.04 V

 Current: 700 mA

 Power: 2.6 W

```

---

## :book:  Documentation

Documentation can be found [here](http://nicholaswilde.io/solar-battery-charger).

---

## :balance_scale:  License

[Apache 2.0 License](./LICENSE)

---

## :pencil:  Author

This project was started in 2022 by [Nicholas Wilde](https://github.com/nicholaswilde/).