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Category: Lora

New LoraWAN GPS Concentrator

New LoraWAN GPS Concentrator

Click to enlarge image PG1301-10.jpg


  • Support Raspberry Pi 3B/3B+/4
  • Up to -142.5dBm sensitivity with SX1257 Tx/Rx front-end
  • 70 dB CW interferer rejection at 1 MHz offset
  • Able to operate with negative SNR, CCR up to 9dB
  • Emulates 49x LoRa demodulators and 1x (G)FSK demodulator
  • Dual digital TX&RX radio front-end interfaces
  • 10 programmable parallel demodulation paths
  • Dynamic data-rate (DDR) adaptation
  • GPS Module to provide timestamp and location info
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MicroPython & ULP/RTC Memory

MicroPython & ULP/RTC Memory

Big power advantages exist for using the ULP ( Ultra Low Power ) processor for regular tasks like recording a state change from a GPIO or ADC input, storing the information within the RTC memory, then waking the main CPU up when the information needs to be transmitted via Lora.… Read More

e-Bike Lithium Ion Load Tester

e-Bike Lithium Ion Load Tester

Using power resistors is not feasable, but AC halogen bulbs are easily sources up to 500W , so multiple bulbs can be used to vary the current

500bulb watts
28.8bulb resistance
52battery voltage

So on a 52V battery pack a 500w halogen bulb would draw about 1.8Amps

Voltage can be monitored with a simple voltage divider to lower the 52V to something suitable ( < 3v probably )

Current can be monitored with a shunt

30A FL-2 DC 75mV Current Shunt Resistor for Ammeter Amperemeter Panel Meter More