Arduino Library

Area65UART Library

The Area65UART library provides a professional-grade interface for transmitting multi-parameter data as JSON via SoftwareSerial on Arduino platforms.

Features

Dynamic parameter count (1-20 values per transmission)
Automatic 2-decimal-place formatting of all numerical values
Built-in rate limiting with configurable delay
JSON output format: {"P1":value1,"P2":value2,...,"P20":value20}
Error handling for invalid parameter counts
Non-blocking delay implementation using millis()
Automatic SoftwareSerial initialization

Installation

Arduino IDE

Download the area65_uart.zip from Github Page
in Arduino IDE click: Sketch → Include Library → Add .ZIP Library → select the ZIP
Restart Arduino IDE

Usage

#include <SoftwareSerial.h>
#include <area65_uart.h>

// Create SoftwareSerial object (RX, TX)
SoftwareSerial mySerial(10, 11);

// Create Area65UART instance
Area65UART sender(mySerial);

void setup() {
  Serial.begin(115200);
  // mySerial is automatically initialized in the Area65UART constructor
}

void loop() {
  // Send single value (P1 only)
  sender.sendData(1, 12.34);

  // Send multiple values (P1, P2, P3)
  sender.sendData(3, 1.5, 2.5, 3.5);

  // Send all 20 values
  sender.sendData(20, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0,
                  10.0, 1.1, 2.2, 3.3, 4.4, 5.5, 6.6, 7.7, 8.8, 9.9);

  delay(2000);
}

Methods

`sendData(int numValues, ...)`

Transmits 1-20 values as P1-P20 in JSON format.

numValues: Number of values to send (1-20)
...: Variable number of float/double values

All numerical values are automatically converted to 2 decimal places.

Returns true on success, false if invalid number of values.

`setDelay(milliseconds)`

Sets a custom minimum delay between sends. Default is 2000ms.

milliseconds: Minimum delay between sends in milliseconds

If sendData() is called before the delay has passed, the send will be skipped.

Example Projects

Arduino Library - Complete bidirectional communication example

Library Structure

arduino_libraries/
├── area65_uart/
│   ├── src/
│   │   ├── area65_uart.h
│   │   └── area65_uart.cpp
│   └── README.md
├── library.properties      # Arduino IDE compatibility
└── area65_uart.zip       # Distributable library archive

Technical Specifications

Parameter	Value
Maximum Values	20 (P1-P20)
Default Delay	2000 ms
Baud Rate	57600
JSON Format	`{"P1":X.XX,"P2":X.XX,...}`