Solar HC-12 remote Weatherstation outdoor unit
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Description
🌤️ DIY Off-Grid Weather Station Project
Hello everyone,
Here’s a part of a DIY project: an off-grid weather station powered by a photovoltaic (PV) panel. It is completely self-sufficient and does not require a Wi-Fi connection to communicate with the indoor unit.
The outdoor unit uses an HC-12 433 MHz transceiver to wirelessly transmit data to the indoor unit. The transmitted data includes:
- 🌡️Outdoor Temperature
- 💧Relative Humidity
- 🌬️Air Pressure
⚡ Power Supply System
The entire system is powered by a Waveshare Solar Power Manager, which:
- Provides the required 5V for the Arduino Nano
- Manages the battery charging and protection (BMS)
- Connects directly to the PV panel
I've attached the source code for the project below.
🧰 Components Used
| Component | Description | Link |
|---|---|---|
| 🔋 Waveshare Solar Power Manager | Power management & BMS | waveshare.com |
| 🔋 18650 Dual Battery Holder | For powering the unit | AliExpress |
| 🧠 Arduino Nano with USB-C | Microcontroller | AliExpress |
| 🌡️ Adafruit BMP280 | Pressure sensor | Adafruit |
| 💧 Adafruit AHT20 | Temperature & humidity sensor | Adafruit |
| 📡 HC-12 Transceiver Module | Wireless communication | AliExpress |
| ☀️ 10W Solar Panel (12V Mono) | Power source | Offgridtec |
| 📦 Universal Enclosure (177×126×56 mm) | For mounting components | Conrad |
| 🔋 18650 Li-Ion Cells | Any brand, unprotected | — (Protection is handled by Solar Power Manager) |
🔧 Additional Tools & Supplies
- 🪛 Sheet metal screws (to mount the Solar Power Manager)
- 🔌 Wires for soldering components
- 🔋 Thicker gauge wires for the battery pack
- 🔥 Soldering iron and solder
- 🔩 Power drill with bits (for cable passthroughs)
🛠️ Notes
- The solar panel I used is oversized for sunny days, but ensures that the system runs reliably even during several cloudy days.
- Batteries must not be protected cells, as the BMS is already integrated into the Solar Power Manager.
🤝 Final Thoughts
Have fun building your own station!
Feel free to ask if you have questions or if something isn't working as expected. 😊
Documentation (2)
License
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