Microhard Telemetry Radio

Radio

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    Holybro Microhard Telemetry Radio integrates microhard Pico Series RF module which is capable of delivering high-performance wireless serial communications in robust topologies, such as Point to Point, Point to Multipoint and secure Mesh (Mesh only available on P900).

    It uses frequency hopping spread spectrum (FHSS) technology, providing reliable wireless asynchronous data transfer between most equipment types which employ a serial interface. Fixed frequency is available on the P840 version. The radio is configured using AT commands through the Data port or using PicoConfig application through the Diagnostic Port.

    P900 Radio operate within the 902-928 MHz ISM frequency band while the P840 operate within 840-845Mhz, and P400 operate within 410-480MHz. You can select your radio based on your country’s available frequency band.

    Features

    • USB Type-C port, integrated USB to UART converter
    • 6-position JST-GH connector, can be directly connected to the TELEM port on various flight controller
    • High voltage BEC onboard, Support DC7~35V voltage supply
    • UART transmission LED indicator
    • Three-stage RSSI LED indicator  
    • Transmission within a public, license-exempt band of the radio spectrum
    • Transparent, low latency link rates up to 276 kbps (P900) and 345 kbps (P860 & P400) 
    • Supports a robust true Mesh operation with auto-routing (P900 Only)
    • 32 bits of CRC, selectable retransmission and forward error correction
    • Separate diagnostics port, transparent remote diagnostics and online network control

    Reference Links

    • Ports & Button
    • Status LED Meaning
    • Default Setting
    • Pinout
    • Dimension
    • Enabling RTS / CTS Flow Control
    • Point-to-Multipoint Setup
    • Downloads
    Specifications
     P900P840P400-C1S
    Frequency Range902 to 928 MHz840 to 845 MHz410 to 480 MHz
    Transmit Power
    (software adjustable)    		100mW to 1W (20-30dBm)100mW to 1W (20-30dBm)100mW to 1W (20-30dBm)
    Link RateUp to 276 kbpsUp to 345 kbpsUp to 345 kbps
    Serial Baud RateUp to 230.4 kbps asynchronous300 bps to 230 kbps
    RangeUp to 40 miles (60 km)Up to 60 miles (100 km)Up to 60 miles (100 km) @ 19.2 kbps
    Spreading MethodFrequency Hopping Spread Spectrum (FHSS)Frequency Hopping/Fixed Frequency,
    GMSK, 2GFSK, 4GFSK, QPSK    		Frequency Hopping,
    GMSK, 2GFSK, 4GFSK, QPSK
    Operating ModesMesh, Point-to-Point, Point-to-Multipoint, Store and Forward,
    Auto Routing, Self Healing, Packet Routing Modes    		Point-to-Point, Point-to-Multipoint,
    Store & Forward Repeater, Peer-to-Peer
    Input VoltageDC7~35V
    (4-position JST-GH)
    Power ConsumptionSleep < 1mA
    Idle 3.5mA
    Rx: 45mA to 98mA
    Tx: 1000mA to 1400mA    		Sleep < 1mA
    Idle 20mA
    Rx: 45mA to 98mA
    Tx Peak: 2A    		Sleep < 1mA
    Idle 20mA
    Rx: 45mA to 98mA
    Tx Peak: 2A
    Error Detection32 bits of CRC, ARQ
    Weight44g (without antenna) 71g (with antenna)44g (without antenna) 71g (with antenna)44g (without antenna) 67g (with antenna)

    SKU17024/17019/17026 Includes:

    • 1x  Microhard P840/P900/P400 Radio
    • 1x  Antenna
    • 1x  XT30 Power cable
    • 1x  GH 6P to 6P cable 
    • 1x  Metal Pin

     

    SKU17025/17020/17027 Includes:

    • 2x  Microhard P840/P900/P400 Radio
    • 2x  Antenna
    • 2x  XT30 Power cable
    • 1x  GH 6P to 6P cable 
    • 1x  Metal Pin