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Description
The SparkFun Postcard is a compact dev board for high-precision PNT needs that combines the Quectel LG290P GNSS RTK with an Espressif ESP32-PICO-MINI-02.
Features & Specs
SparkFun RTK Postcard Features
- Quectel LG290P quad-band, GNSS module
- Concurrent signal reception: 5 + QZSS
-
L1, L2, L5, E6 frequency bands
-
- GNSS Constellations:
- GPS (USA)
- GLONASS (Russia)
- Galileo (EU)
- BDS (China)
- QZSS (Japan)
- NavIC (India)
- SBAS Systems:
- WAAS (USA)
- SDCM (Russia)
- EGNOS (EU)
- BDSBAS (China)
- MSAS (Japan)
- GAGAN (India)
- Built-in NIC anti-jamming unit
- Concurrent signal reception: 5 + QZSS
- ESP32-PICO-MINI-N8R2 module
- Firmware: RTK Everywhere
- Provides WiFi/BT connectivity
- WiFi 802.11b/g/n
- Bluetooth
- Buttons
- EPS32 Reset
- ESP32 Boot
- Breakout board:
- Dimensions: 1.70" x 1.70" (43.2mm x 43.2mm)
- Four mounting holes:
- 4-40 screw compatible
- Input Voltage Range: 3.0 to 5.5V (5V pin)
- Connections:
- 19 PTH pins
- 4-pin JST-SH Qwiic connector (x2)
- USB-C connector
- 4-pin locking JST-GH connector
- SMA antenna connector
- u.fl antenna connector
- LEDs:
-
STAT - Green general status indicator
-
PWR - Red 3.3V power indicator
-
PPS - Yellow Pulse-Per-Second indicator
-
RTK - White RTK fix/correction indicator
-
BT - Blue Bluetooth indicator
-
- Backup battery
LG290P General Features
- High-precision GNSS module
- Electrical Characteristics:
- Supply Voltage: 3.15 to 3.45V
- Current Consumption:
- Normal Operation:
- 91mA (300.3mW) (Acquisition)
- 91mA (300.3mW) (Tracking)
- Power Saving Mode:
- 12μA (39.6mW) (Backup Mode)
- Normal Operation:
- GNSS Frequency bands:
- GPS: L1 C/A, L1C*, L5, L2C
- GLONASS: L1, L2
- Galileo: E1, E5a, E5b, E6
- BDS: B1I, B1C, B2a, B2b, B2I, B3I
- QZSS: L1 C/A, L1C*, L5, L2C
- NavIC: L5
- SBAS: L1 C/A
- L-band PPP*:
- PPP: B2b
- QZSS: L6
- Galileo HAS: E6
- Tracking Channels: 1040
- Horizontal Position Accuracy:
- Autonomous: 0.7m
- RTK: 0.8cm + 1ppm
- Vertical Accuracy:
- Autonomous: 2.5m
- RTK: 1.5cm + 1ppm
- Velocity Accuracy Without Aid: 0.03m/s
- Accuracy of 1PPS Signal: 5ns (RMS)
- RTK Convergence Time: 5s
- Time to First Fix (without AGNSS):
- Cold Start: 28s
- Warm Start: 28s
- Hot Start: 1.7s
- Sensitivity:
- Acquisition: -146dBm
- Tracking: -160dBm
- Reacquisition: -155dBm
- Dynamic Performance:
- Maximum Altitude: 10000m
- Maximum Velocity: 490m/s
- Maximum Acceleration: 4g
- Update Rate:
- Default: 10Hz
- Max: 20Hz
- Antenna Interface:
- External active antenna
- Power Supply: External or Internal
- Interfaces
- UART (x3)
- Baud Rate: 9600–3000000bps
- Default: 460800bps
- Protocol: NMEA 0183/RTCM 3.x
- SPI* (x1)
- I2C* (x1)
- UART (x3)
- Operating temperature: -40 to 85°C
- Footprint: 12.2mm × 16mm × 2.6mm
- Weight: ~0.9g
ESP32 General Features
- Electrical Characteristics:
- Operating Voltage: 3.0 to 3.6 V
- Current Consumption:
- RF Operation: 368mA (peak)
- Normal Operation: 20-31mA
- Light-Sleep: 0.8mA
- Deep-Sleep: 5µA
- Xtensa® Dual-Core 32-bit LX6 Microprocessor (up to 240MHz)
- 448KB of ROM and 520KB SRAM
- 8MB SPI Flash
- 2MB PSRAM
- 16KB SRAM in RTC
- PCB antenna
- WiF 802.11b/g/n
- Bit Rate: up to 150Mbps (802.11n)
- Frequency Range: 2412 - 2484MHz
- Bluetooth
- Bluetooth v4.2 Specification:
- BR/EDR
- Bluetooth LE
- Transmitter Class: 1, 2, and 3
- Bluetooth v4.2 Specification:
- Supported Peripherals:
- SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, TWAI® (compatible with ISO 11898-1, i.e. CAN Specification 2.0), Ethernet MAC
- Operating Temperature: -40 to 85°C
*: Feature is still under development
Features & Specs
SparkFun RTK Postcard Features
- Quectel LG290P quad-band, GNSS module
- Concurrent signal reception: 5 + QZSS
-
L1, L2, L5, E6 frequency bands
-
- GNSS Constellations:
- GPS (USA)
- GLONASS (Russia)
- Galileo (EU)
- BDS (China)
- QZSS (Japan)
- NavIC (India)
- SBAS Systems:
- WAAS (USA)
- SDCM (Russia)
- EGNOS (EU)
- BDSBAS (China)
- MSAS (Japan)
- GAGAN (India)
- Built-in NIC anti-jamming unit
- Concurrent signal reception: 5 + QZSS
- ESP32-PICO-MINI-N8R2 module
- Firmware: RTK Everywhere
- Provides WiFi/BT connectivity
- WiFi 802.11b/g/n
- Bluetooth
- Buttons
- EPS32 Reset
- ESP32 Boot
- Breakout board:
- Dimensions: 1.70" x 1.70" (43.2mm x 43.2mm)
- Four mounting holes:
- 4-40 screw compatible
- Input Voltage Range: 3.0 to 5.5V (5V pin)
- Connections:
- 19 PTH pins
- 4-pin JST-SH Qwiic connector (x2)
- USB-C connector
- 4-pin locking JST-GH connector
- SMA antenna connector
- u.fl antenna connector
- LEDs:
-
STAT - Green general status indicator
-
PWR - Red 3.3V power indicator
-
PPS - Yellow Pulse-Per-Second indicator
-
RTK - White RTK fix/correction indicator
-
BT - Blue Bluetooth indicator
-
- Backup battery
LG290P General Features
- High-precision GNSS module
- Electrical Characteristics:
- Supply Voltage: 3.15 to 3.45V
- Current Consumption:
- Normal Operation:
- 91mA (300.3mW) (Acquisition)
- 91mA (300.3mW) (Tracking)
- Power Saving Mode:
- 12μA (39.6mW) (Backup Mode)
- Normal Operation:
- GNSS Frequency bands:
- GPS: L1 C/A, L1C*, L5, L2C
- GLONASS: L1, L2
- Galileo: E1, E5a, E5b, E6
- BDS: B1I, B1C, B2a, B2b, B2I, B3I
- QZSS: L1 C/A, L1C*, L5, L2C
- NavIC: L5
- SBAS: L1 C/A
- L-band PPP*:
- PPP: B2b
- QZSS: L6
- Galileo HAS: E6
- Tracking Channels: 1040
- Horizontal Position Accuracy:
- Autonomous: 0.7m
- RTK: 0.8cm + 1ppm
- Vertical Accuracy:
- Autonomous: 2.5m
- RTK: 1.5cm + 1ppm
- Velocity Accuracy Without Aid: 0.03m/s
- Accuracy of 1PPS Signal: 5ns (RMS)
- RTK Convergence Time: 5s
- Time to First Fix (without AGNSS):
- Cold Start: 28s
- Warm Start: 28s
- Hot Start: 1.7s
- Sensitivity:
- Acquisition: -146dBm
- Tracking: -160dBm
- Reacquisition: -155dBm
- Dynamic Performance:
- Maximum Altitude: 10000m
- Maximum Velocity: 490m/s
- Maximum Acceleration: 4g
- Update Rate:
- Default: 10Hz
- Max: 20Hz
- Antenna Interface:
- External active antenna
- Power Supply: External or Internal
- Interfaces
- UART (x3)
- Baud Rate: 9600–3000000bps
- Default: 460800bps
- Protocol: NMEA 0183/RTCM 3.x
- SPI* (x1)
- I2C* (x1)
- UART (x3)
- Operating temperature: -40 to 85°C
- Footprint: 12.2mm × 16mm × 2.6mm
- Weight: ~0.9g
ESP32 General Features
- Electrical Characteristics:
- Operating Voltage: 3.0 to 3.6 V
- Current Consumption:
- RF Operation: 368mA (peak)
- Normal Operation: 20-31mA
- Light-Sleep: 0.8mA
- Deep-Sleep: 5µA
- Xtensa® Dual-Core 32-bit LX6 Microprocessor (up to 240MHz)
- 448KB of ROM and 520KB SRAM
- 8MB SPI Flash
- 2MB PSRAM
- 16KB SRAM in RTC
- PCB antenna
- WiF 802.11b/g/n
- Bit Rate: up to 150Mbps (802.11n)
- Frequency Range: 2412 - 2484MHz
- Bluetooth
- Bluetooth v4.2 Specification:
- BR/EDR
- Bluetooth LE
- Transmitter Class: 1, 2, and 3
- Bluetooth v4.2 Specification:
- Supported Peripherals:
- SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, TWAI® (compatible with ISO 11898-1, i.e. CAN Specification 2.0), Ethernet MAC
- Operating Temperature: -40 to 85°C
*: Feature is still under development
Documentation
- Design Files
- Hookup Guide
- Component Documentation
- Qwiic Info Page
- GitHub Repositories:
WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. See link below for more information. www.P65Warnings.ca.gov
Bulk Discount
| Quantity | Price |
| 2 | ₹ 27807.5 |
| 3-5 | ₹ 27523.75 |
| 5-10 | ₹ 26956.25 |
| 10+ | ₹ 26388.75 |
Bulk discount will be automatically applied during checkout based on quantity.