https://github.com/tserumula/remotelowbattery

ESP8266-Based Remote Battery Monitoring and Low-Level Indication
https://github.com/tserumula/remotelowbattery

arduino esp8266 nodemcu nodemcu-esp8266 platformio remote-access

Last synced: about 2 months ago
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ESP8266-Based Remote Battery Monitoring and Low-Level Indication

• Host: GitHub
• URL: https://github.com/tserumula/remotelowbattery
• Owner: tserumula
• Created: 2024-08-17T10:10:36.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2024-08-17T11:40:29.000Z (6 months ago)
• Last Synced: 2024-11-03T20:42:06.910Z (3 months ago)
• Topics: arduino, esp8266, nodemcu, nodemcu-esp8266, platformio, remote-access
• Language: C++
• Homepage:
• Size: 5.86 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# ESP8266-Based Remote Battery Monitoring and Low-Level Indication

This project aims to remotely monitor the battery level of a device by fetching data from a server and indicating when the battery is low. The ESP8266 WiFi module is used to periodically connect to a server via HTTP and retrieve the battery level. If the battery level is low, an LED will turn on, signaling the need for charging.

## Why This Project?

Remotely monitoring battery levels is valuable for IoT applications where the device lacks a display or is not frequently checked. This project can be extended to include hardware that enables automatic charging of the client device (coming soon in a future project).

## Platform and Hardware

- Developed using PlatformIO IDE in Visual Studio Code.

- WiFi module: NodeMCU ESP8266 12-E.

- Arduino Framework is used.

## Dependencies

To set up the project in PlatformIO:

1. Set your board to Espressif ESP8266 ESP-12E (or an equivalent board). This will automatically add the necessary libraries.

2. Add the [ArduinoJson](https://www.arduino.cc/reference/en/libraries/arduinojson/) library to the project:

   - Navigate to the PlatformIO tab > Libraries.

   - Search for "ArduinoJson" and add the "ArduinoJson" library by Benoit Blanchon.

## Server API Response

For each HTTP request, your web server should return a JSON-encoded response in the following format:

```json

{ "battery": 75, "param2": "value2" }

```

The MCU will look for the "battery" parameter, which should be an integer value.

## Setup Instructions

1. Open the `src/main.cpp` file and add your Wi-Fi credentials:

```

const char *wifi_ssid = "YOUR_WIFI_SSID"; // Replace with your values

const char *wifi_password = "YOUR_WIFI_PASSWORD"; // Replace with your values

```

2. Provide the URL path to your web server:

```

const char *hostURL = "http://YOUR_SERVER_DOMAIN/PATH"; // Replace with your values

```

3. If your HTTP request requires authentication via an API key/token, add your key value:

```

String httpRequestData = "auth=YOUR_API_KEY&deviceId=esp8266_nmcu_12e";

```

Replace `YOUR_API_KEY` with your own key and modify deviceId as needed.