Part name: LR1110
Manufacturer: Semtech
Price:
Supplier:
Part name: NJG1801K75-TE1
Manufacturer: NJR
Price: 0,15€ kos @ 5k kos
Part name: NJG1699MD7
Manufacturer: NJR
Price: ???€ kos @ ??? kos
Part name: NJG1155UX2
Manufacturer: NJR
Price: 0,175€ kos @ 3k kos
Wisent edge is based on Lion pcb
List of changes for first revision:
Change
Description
Status
Replace Murata ABZ with nRF52840
Add LR1110 transceiver with LoRaWAN output on HP port with Antenova antenna
Pin Y2 connect to VBAT. Remove wire between B1 and C51.
Remove resistor R4 on top side of PCB.
Check short circuit on power lines (Vin, Vchrg, VBAT, VDD_NRF52, 1.8V, VLORA)
R22, R25, R43, R44 do not place
Power up 3.6V (I=10mA) on VBAT
No boot - test blinky (new chip)
Boot up normal, high power consumption
Boot up normal, high power consumption
Boot up normal, low power consumption
Boot up normal, low power consumption
Test battery charging
Test connection to NRF via Tag connect
Check I2C lines if HIGH
Check reset if HIGH on both chips
Test LED diode
When enable 1.8V current jump to 10-15mA
Battery measurement enable to measure battery voltage (Supply voltage = 3.6V, R1 = 220R, R2 = 390 R, Output voltage = 2.302 V)
Measure I2C lines
OK
Check reset pins
OK
Test LED diode
OK
Check battery measurement circuit
OK
Measure I2C lines
OK
Check reset pins
OK
Test LED diode
OK
Check battery measurement circuit
OK
Measure I2C lines
OK
Check reset pins
OK
Test LED diode
OK
Check battery measurement circuit
OK
Measure I2C lines
OK
Check reset pins
OK
Test LED diode
OK
Check battery measurement circuit
OK
Measure I2C lines
OK
Check reset pins
OK
Test LED diode
OK
Check battery measurement circuit
OK
Add u.fl connector to LR1110 LP output for VHF
Combine WiFi and BLE via RF switch on single antenna
Split GPS after LNA to LR1110 and ublox
Test
Results
Short circuits
NONE
Power up
OK
Measure VDD_NRF52
1.8V
Measure 1.8V (expect 1.8V)
1.8V
Measure VLORA (expect 2.5V)
2.5V
Test
Results
Short circuits
NONE
Power up
OK
Measure VDD_NRF52
1.8V
Measure 1.8V (expect 1.8V)
1.8V
Measure VLORA (expect 2.5V)
2.5V
Test
Results
Short circuits
NONE
Power up
OK
Measure VDD_NRF52
1.8V
Measure 1.8V (expect 1.8V)
1.8V
Measure VLORA (expect 2.5V)
2.5V
Test
Results
Short circuits
NONE
Power up
OK
Measure VDD_NRF52
1.8V
Measure 1.8V (expect 1.8V)
1.8V
Measure VLORA (expect 2.5V)
2.5V
Test
Results
Short circuits
NONE
Power up
OK
Measure VDD_NRF52
1.8V
Measure 1.8V (expect 1.8V)
1.8V
Measure VLORA (expect 2.5V)
2.5V
Battery charging (connect to 12V (I=500mA))
Battery charging (connect to 12V (I=500mA))
Battery charging (connect to 12V (I=500mA))
Battery charging (connect to 12V (I=500mA))
Battery charging (connect to 12V (I=500mA))
