Product overview
The Rctimer NEO-M8N GPS & MAG(Compass) V2.1 combines a u-blox NEO-M8N receiver with an HMC5883L compass for integration with APM and Pixhawk flight controllers. Its physical architecture includes a 25 x 25 x 4mm ceramic patch antenna with active circuitry, an LNA and SAW chip, and a 3.3V low-noise LDO regulator. The module can be mounted away from interference sources. Its UART (TTL) interface has EMI protection, while input power has reverse polarity protection.
The supplied configuration includes a Pixhawk cable; fitting APM requires changing the 1.25-6P plug shell to 5P. Rechargeable 3V backup capacitors support warm starts, and an LED indicates a fix. The feature list specifies a 10Hz update rate, while the default configuration uses 1Hz, baud rate 9600 and UBX+NMEA. With APM 2.xx or Pixhawk, controller firmware overrides those defaults to use 5Hz, baud rate 38,400 and UBX with NMEA disabled. The default GNSS selection is GPS+GLONASS+BeiDou+QZSS+SBAS.
Specifications
| Specification | Value & conditions |
|---|---|
| Product identity | Rctimer NEO-M8N GPS & MAG(Compass) V2.1 |
| GNSS receiver module | U-blox NEO-M8N |
| Navigation constellations | GPS, GLONASS, Galileo, QZSS and SBAS |
| Compass | HMC5883L |
| Mounting provision | Can be mounted away from sources of interference |
| Antenna circuitry | Active circuitry for the ceramic patch antenna |
| Antenna dimensions and construction | 25 x 25 x 4mm ceramic patch antenna |
| RF components | LNA and SAW chip |
| Voltage regulator | 3.3V LDO low noise regulator |
| Communication interface | UART (TTL) port with EMI protection |
| Backup capacitors | 3V rechargeable backup capacitors |
| Backup function | Rechargeable backup capacitors support warm starts |
| Fix indication | Fix indicator LED |
| Input power protection | Reverse polarity protection |
| Flight controller integration | Designed for APM / Pixhawk |
| Included cable | Cable for Pixhawk includedSupplied configuration. |
| Connector adaptation | Change the 1.25-6P plug shell to 5PFor connection to APM. |
| Update rate feature | 10Hz |
| Default GNSS configuration | GPS+GLONASS+BeiDou+QZSS+SBASDefault configuration before APM or Pixhawk firmware overrides. |
| Default protocols | UBX+NMEADefault configuration before APM or Pixhawk firmware overrides. |
| Default baud rate | 9600Default configuration before APM or Pixhawk firmware overrides. |
| Default update rate | 1HzDefault configuration before APM or Pixhawk firmware overrides. |
| TIMEPULSE / green fix LED rate | 1HzDefault configuration. |
| Firmware-configured baud rate | 38,400Connected to APM 2.xx or Pixhawk. |
| Firmware-configured update rate | 5HzConnected to APM 2.xx or Pixhawk. |
| Firmware-configured protocols | NMEA off; UBX onConnected to APM 2.xx or Pixhawk. |
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