WisentEdgePCB
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 | ||
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 |
Erata:
Pin Y2 connect to VBAT. Remove wire between B1 and C51.
Remove resistor R4 on top side of PCB.
Check list for testing:
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
Measure VDD_NRF52, 1.8V(Enable), VLORA(2.5V)
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)
Edge tracker 1
No boot - test blinky (new chip)
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)) | |
Measure I2C lines | OK |
Check reset pins | OK |
Test LED diode | OK |
Check battery measurement circuit | OK |
Edge tracker 2
Boot up normal, high power consumption
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)) | |
Measure I2C lines | OK |
Check reset pins | OK |
Test LED diode | OK |
Check battery measurement circuit | OK |
Edge tracker 3
Boot up normal, high power consumption
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)) | |
Measure I2C lines | OK |
Check reset pins | OK |
Test LED diode | OK |
Check battery measurement circuit | OK |
Edge tracker 4
Boot up normal, low power consumption
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)) | |
Measure I2C lines | OK |
Check reset pins | OK |
Test LED diode | OK |
Check battery measurement circuit | OK |
Edge tracker 5
Boot up normal, low power consumption
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)) | |
Measure I2C lines | OK |
Check reset pins | OK |
Test LED diode | OK |
Check battery measurement circuit | OK |
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