HM-TRP-RS485

Description

HM-TRP-RS485 Transparent Wireless Serial RS485 Module 433M470M868M915M

RS485 Interface Wireless Data Transceiver Module 100mW, operates in ISM band 433/470/868/915MHz. Compact size, high power, high sensitivity, transmission distance, high number of communications, internal protocol conversion with automatic completion and data transceiver control functions. Transmission distance up to 1Km in open field without interference.

Wireless Data Transceiver Module HM-TRP-RS485 100mW

HM-TRP-RS485 is a low-cost, high-performance transparent wireless data transceiver FSK module. It can operate in the ISM band 433/470/868/915 MHz.

Package Dimension

44,1 * 30 * 1,2mm

1. Introduction

HM-TRP-RS485 is a high-performance transparent wireless FSK data transceiver module. It can operate in the ISM band 433/470/868 / 915MHz. With reduced size, high power, high sensitivity, transmission distance, high number of communications, internal protocol communication conversion with automatic completion, and data transceiver control functions. The module provides a serial RS-485 data interface, serial data can only provide simple wireless data transmission functions. Users also have the flexibility to configure the serial speed tactile blocks based on their needs, frequency, transmission power, communications, data rate, frequency deviation, reception bandwidth parameter settings. The HM-TRP-RS485 series modules can be widely applied to various types of wireless data transmission fields, it is the ideal choice for wireless data transmission product design.

2. Features

HM-TRP-RS485

Low cost, high performance, high reliability.
FSK modulation, half-duplex communication, anti-interference capability.
433/470/868 / 915 MHz ISM Band, no frequency application required.
Maximum output power 100mW (20dBm), output power can be adjusted in the range of 1-20dBm.
Reception sensitivity -117dBm.
Transmission operating current 100mA @ 20dBm, 40mA @ 14dBm.
Reception operating current 25mA.
Low power consumption sleep mode current 1uA.
Operating frequency can be set to allow multiple modules frequency division multiplexing without interference.
Frequency deviation and receiver bandwidth available, user can configure software.
Protocol conversion and RF retransmitter for automatic switching, no user intervention required, easy to use.
Communication speed 1.2 kbps – 115.2 kbps, users can configure the software.
ENABLE the control signal provided by the user that controls the work cycle to meet different requirements.
RSSI function.
LED indicator.
Transmission range, up to 1Km in open field without interference.
PCB volume of 44.1 * 30X1.2 MM.
Debug without production.
Compliance with FCC, ETSI standards.

3. Applications

Telemetry
Wireless meter reading
Access control system
Identification
Data collection
Information appliances
Smart Home
Baby Monitor

Tutorial: How to use HM-TRP-RS485

The HM-TRP-RS485 module allows RS485 devices to be connected to a Bluetooth network. It is ideal for makers who want to integrate wireless communication into automation projects.

What you need

• Arduino Uno or compatible
• USB cable
• computer with Arduino IDE software installed

Steps

1. Connect the HM-TRP-RS485 module to the Arduino following the product documentation.
2. Download and configure the Arduino IDE on a computer.
3. Load the example sketch provided for the RS485 module.
4. Verify that the module connects correctly to your device’s Bluetooth.
5. Test communication by sending data from the PC to the Arduino via the HM-TRP-RS485 module.

Example code

void setup() {
  Serial.begin(9600);
}

void loop() {
  if (Serial.available()) {
    String data = Serial.readString();
    // Elabora dati ricevuti
  }
}

Mini project

Create a remote control system for lights or other RS485 devices using the HM-TRP-RS485 module and the Arduino.

Common mistakes

• Incorrect serial settings.
• Incorrect connection between Arduino and module.
• Bluetooth connection issues.
• Data sent in unsupported format.

Recommended accessories

• USB A-MicroB cable
• External antenna to improve Bluetooth reception
• RS485 compatible sensors

Frequently asked questions

What is the maximum communication range?
Check the datasheet of the HM-TRP-RS485 module.

Can I use this module with other microcontrollers?
Yes, but it may be necessary to modify the sketch to adapt it to the specifications of the new microcontroller.