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. FCC ID: NS913P900 Feature 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 Specification P900 P840 P400-C1S Frequency Range 902 to 928 MHz 840 to 845 MHz 410 to 480 MHz Transmit Power(software adjustable) 100mW to 1W (20-30dBm) 100mW to 1W (20-30dBm) 100mW to 1W (20-30dBm) Link Rate Up to 276 kbps Up to 345 kbps Up to 345 kbps Serial Baud Rate Up to 230.4 kbps asynchronous 300 bps to 230 kbps Spreading Method Frequency Hopping Spread Spectrum (FHSS) Frequency Hopping/Fixed Frequency,GMSK, 2GFSK, 4GFSK, QPSK Frequency Hopping,GMSK, 2GFSK, 4GFSK, QPSK Operating Modes Mesh, 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 Voltage DC7~35V(4-position JST-GH) Power Consumption Sleep < 1mAIdle 3.5mARx: 45mA to 98mATx: 1000mA to 1400mA Sleep < 1mAIdle 20mARx: 45mA to 98mATx Peak: 2A Sleep < 1mAIdle 20mARx: 45mA to 98mATx Peak: 2A Error Detection 32 bits of CRC, ARQ Antenna Gain 5dBi Weight 44g (without antenna) 71g (with antenna) 44g (without antenna) 71g (with antenna) 44g (without antenna) 67g (with antenna) Other Technical details and downloads can be found on the Holybro Documentation page. Reference Links Ports & Button Status LED Meaning Default Setting Pinout Dimension Enabling RTS / CTS Flow Control Point-to-Multipoint Setup Downloads 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
