Wireless NRF905 PTR8000 433MHz Module with Antenna (433/486 / 915MHz)

Description

Here is a complete description of the module Wireless NRF905 PTR8000 433MHz with antenna, accompanied by a full guide for use with Arduino, including practical code examples.

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🔧 Wireless NRF905 PTR8000 433MHz Module with antenna

📌 Main Features

• Model: NRF905 (PTR8000 version)
• Operating Frequency: 433 MHz (supports 868 MHz / 915 MHz via software selection)
• Modulation: GFSK (Gaussian Frequency Shift Keying)
• Operating Voltage: 1.9V – 3.6V (recommended 3.3V)
• Transmission Current: ~10 mA
• Reception Current: ~12.5 mA
• Range: up to 1000 meters in open field with appropriate antenna
• Transfer Speed: 50 Kbps
• Antenna: SMA 433/868/915 MHz included
• Interface: 4-wire SPI (MOSI, MISO, SCK, CSN)
• Compatibility: Arduino, ESP32, STM32, Raspberry Pi (via adapters)

📦 Module Pinout

Pin	Description
VCC	3.3V Power
GND	GND
MISO	SPI – Master In Slave Out
MOSI	SPI – Master Out Slave In
SCK	SPI – Clock
CSN (SEL)	Chip Select
CE	Chip Enable
TXE	Enable Transmission
PWR	Power Up Mode
DR	Data Ready
AM	Address Match
CD	Carrier Detect

⚠️ Attention: Do not connect the module directly to 5V, it may get damaged. Use a logic level converter if working with 5V Arduino.

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🧪 Configuration Guide with Arduino

✅ Required

• NRF905 PTR8000 Module
• Two Arduino UNO or similar (one transmitter, one receiver)
• Jumper wires
• 433 MHz SMA Antenna
• NRF905 Library

🔌 Connections with Arduino UNO

NRF905	Arduino UNO
VCC	3.3V
GND	GND
MISO	12
MOSI	11
SCK	13
CSN	10
CE	8
TXE	9
PWR	7
DR	2 (Optional Interrupt)

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🧰 Install the library

1. Download the library from GitHub:
   • NRF905 Arduino Library (by jwhiddon)
2. Go to Arduino IDE > Sketch > Include Library > Add .ZIP Library and select the downloaded file.

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📡 Example Code – Transmitter

#include <SPI.h>
#include <NRF905.h>

byte dataToSend[] = "HELLO";

void setup() {
 Serial.begin(9600);
 nrf905_init();
 Serial.println("Trasmettitore pronto.");
}

void loop() {
 nrf905_set_tx_data(dataToSend, sizeof(dataToSend));
 nrf905_tx();
 Serial.println("Dati trasmessi.");
 delay(1000);
}

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📶 Example Code – Receiver

#include <SPI.h>
#include <NRF905.h>

void setup() {
 Serial.begin(9600);
 nrf905_init();
 Serial.println("Ricevitore pronto.");
}

void loop() {
 if (nrf905_data_ready()) {
 byte dataReceived[NRF905_MAX_PAYLOAD];
 nrf905_get_rx_data(dataReceived, NRF905_MAX_PAYLOAD);
 Serial.print("Ricevuto: ");
 for (byte i = 0; i < NRF905_MAX_PAYLOAD; i++) {
 Serial.write(dataReceived[i]);
 }
 Serial.println();
 }
}

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⚙️ Advanced Configuration

You can modify:

• Frequency: via nrf905_set_frequency(433000000);
• Data Rate: only 50 Kbps (not modifiable)
• Transmission Power: function nrf905_set_power(0); // da 0 a 3

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📌 Usage Tips

• Use two modules for testing (one TX, one RX).
• Avoid interference: test in environments with few RF signals.
• Power the module with a stable 3.3V regulator.
• The library supports only buffers up to 32 bytes.

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📚 Useful Resources

• Official NRF905 Datasheet: Nordic Semiconductor Datasheet
• Alternative library (more advanced): https://github.com/zkemble/nRF905

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GENERAL	MODEL	NRF905
MATERIALS	pcb + plastic + components
COMPATIBILITY	ARDUINO
ELECTRICAL COMPONENTS	INPUT VOLTAGE	1.9 – 3.6 V
WEIGHT AND DIMENSIONS	PRODUCT WEIGHT	11g
PACKAGE WEIGHT	0.155 kg
PRODUCT DIMENSIONS (L x W x H)	3.2 x 2 x 1.3 cm + 5 x 0.7 x 0.7 cm
PACKAGE DIMENSIONS (L x W x H)	5 x 10 x 2 cm
CONTENTS OF THE PACKAGE	CONTENTS OF THE PACKAGE	1 x Module

We have available the technical sheet of all components, should it not be present in the product download card send a message from the contact us form and we will publish as soon as possible on our website.

Tutorial: How to use NRF905

This wireless module is ideal for projects that require long-range wireless data transmission. Useful for beginners and intermediate makers.

What you need

• Arduino or compatible microcontroller
• Power cable
• Antenna (optional)
• 10kΩ resistor (for pull-up)

Steps

1. 1. Connect the NRF905 module to the microcontroller using the following pins: VCC to 5V, GND to GND, TX to one of the RX pins of the microcontroller (e.g., pin 10 of Arduino).
2. 2. Connect the antenna to the ANT pin of the module (optional).
3. 3. Connect a 10kΩ resistor between the RX pin of the module and the GND pin. This resistor acts as a pull-up.
4. 4. Load the following code onto the microcontroller.
5. 5. Configure the transmission frequency (433MHz, 486MHz or 915MHz) on the module.
6. 6. Test the transmission by sending a message.
7. 7. Connect another NRF905 module to another microcontroller.
8. 8. Configure the same frequency on the second module and receive the sent message.

Example code

```cpp
#include <SoftwareSerial.h>

SoftwareSerial nrf905(10, 11); // RX, TX

void setup() {
 nrf905.begin(433000); // Configura frequenza
 Serial.begin(9600);
}

void loop() {
 if (nrf905.available()) {
 String message = nrf905.readString();
 Serial.println(message);
 }
}
```

Mini project

Create a remote alarm system. Install an NRF905 module on a motion detector and the other on a doorbell. When the motion detector is triggered, the doorbell rings.

Common mistakes

• Fail to correctly configure the frequency on the module.
• Forget the pull-up resistor.
• Connect the module to the microcontroller with the wrong pins.
• Use a frequency not supported by the module.

Recommended accessories

• NRF905 Module 433MHz
• Arduino Uno
• 433/486/915MHz Antenna
• Motion Detector

Frequently asked questions

How can I check the supported frequency of the module?
Check the datasheet.

Can I use this module with a microcontroller different from Arduino?
Yes, but make sure the pinout is compatible.

Which pull-up resistor to use?
10kΩ.