Holybro Microhard P840 module

Order the Holybro Microhard P840 long-range radio module for ultra-long-range communication with your drone!

Provide reliable telemetry and control over record distances. The Holybro Microhard P840 module operates in the 840‑845 MHz range with an output power of up to 1 W. The communication range reaches 100 kilometers in ideal conditions. The device supports Point-to-Point, Point-to-Multipoint and Repeater modes. Choose a professional solution for long flights and complex missions.

• Ultra long-distance communication up to 100 km. Confident telemetry and control at extreme distances.

• Programmable power 100 mW – 1 W. Adapt the range to the flight conditions.

• FHSS technology and fixed frequency. High noise immunity and configuration flexibility.

• Many operating modes. Point-to-point, point-to-multipoint, repeater and Mesh (P2P).

• Built-in BEC and wide 7-35V power supply. Connects directly to the drone's onboard battery.

Operating principle and key features

The Holybro Microhard P840 module is a transceiver operating in the licensed range 840‑845 MHz. It uses frequency hopping spread spectrum (FHSS) technology, which provides high immunity to interference. Fixed frequency operation is also supported. Modulations: GMSK, 2GFSK, 4GFSK and QPSK.

The data transmission speed over the radio channel reaches 345 kbit/s. The serial port speed is configurable from 300 baud to 230 kbps. Error detection is performed by a 32-bit CRC and an automatic retransmission request (ARQ) mechanism. The device can operate in point-to-point (P2P), point-to-multipoint, store-and-forward repeater, and peer-to-peer (Mesh) modes. Power supply 7-35 VDC.

Current consumption: in sleep mode <1 mA, standby 20 mA, when receiving 45‑98 mA, when transmitting (peak) up to 2 A. The module is equipped with USB Type-C with a built-in USB-UART converter for configuration via a computer. It is connected to the flight controller via a 6-pin JST-GH connector (TELEM port).

LEDs indicate UART transmission and RSSI signal strength. Configuration is performed using AT commands or through the PicoConfig utility. The weight of the module without antenna is 44 g, with antenna (gain 5 dBi) - 71 g. The built-in high-voltage BEC allows the module to be powered directly from the drone battery (up to 6S).

The Holybro Microhard P840 module is ideal for long-range drones, telemetry systems, ground stations, swarm missions and industrial automation. Thanks to its high power and noise immunity, it is indispensable in urban areas and over long distances.

Specifications 

• Frequency range: 840-845 MHz
• Output power: 100 mW - 1 W (20-30 dBm), software adjustable
• Transfer rate (link): up to 345 kbps
• Serial port speed: 300 baud - 230 kbps
• Communication range: up to 100 km (60 miles) in ideal conditions
• Spread Spectrum Method: FHSS (Frequency Hopping) / Fixed Frequency, GMSK, 2GFSK modulations,
• 4GFSK, QPSK
• Operating modes: Point-to-Point, Point-to-Multipoint, Store & Forward Repeater, Peer-to-Peer
• Input voltage: DC 7-35 V (4-pin JST-GH connector)
• Current Consumption: Sleep: <1mA, Standby: 20mA, Receive: 45-98mA, Transmit (Peak): 2A
• Error detection: 32 bit CRC, ARQ
• Weight: 44 g (without antenna), 71 g (with antenna)
• Antenna gain: 5dBi
• Connectors and interfaces: USB Type-C with built-in USB-UART converter, 6-pin JST-GH for
• connection to the flight controller (TELEM port)
• Indication: UART transmission LED, three-stage RSSI LED
• Features: Built-in high voltage BEC, support fixed frequency, AT-tuning
• commands or via PicoConfig.