Hi all, I have a TTGO-T-Beam ver. 0.7 and I’m trying to make the Car Tracker work with ABP in the AU_915 TTN band (1) however it seams that it is not working. I have enabled the debug to 2 to see the frequencies and it looks like it is using the AS923. The project config file however is set to AU_915.
I looked everywhere but can’t find any reference which enables this behavior anywhere in the Library.
There are two lines in the ARDUINO code for the Car Tracker application which may cause this behavior but I don’t really understand them
//Disable link check validation
//////////////////////////////////////////////
LMIC_setLinkCheckMode(0);
// TTN uses SF9 for its RX2 window.
LMIC.dn2Dr = DR_SF9;
// Set data rate and transmit power for uplink (note: txpow seems to be ignored by the library)
LMIC_setDrTxpow(DR_SF7, 14);
/////////////////////////////////////////if I comment them out than the application will not compile.
This is the output from the debug
## rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0018,len:4
load:0x3fff001c,len:1216
ho 0 tail 12 room 4
load:0x40078000,len:9720
ho 0 tail 12 room 4
load:0x40080400,len:6364
entry 0x400806b8
LoRa & GSM based TTN car tracker
BME280 initialized sucessfully
BMP/BME280: normal mode, 16x pressure / 2x temperature / 1x humidity oversampling,
0.5ms standby period, filter 16x
Initializing LoRa module
RXMODE_RSSI
Ready to track
Battery voltage: 3.47V
Temperature = 24.97C, Pressure = 997.02hPa, Approx. Altitude = 136.04m, Humidity = 60.13%
Valid gps Fix.
Lat: -33.653067
Lng: 151.131743
Alt: 208.700000 meters
Speed: 0.277800 km/h
Sats: 11
193558: engineUpdate, opmode=0x808
Unknown event
193738: TXMODE, freq=921200000, len=43, SF=7, BW=125, CR=4/5, IH=0
30 bytes long LPP packet queued.
260953: setupRx1 txrxFlags 00 → 01
start single rx: now-rxtime: 4
261585: RXMODE_SINGLE, freq=926900000, SF=7, BW=500, CR=4/5, IH=0
rxtimeout: entry: 261813 rxtime: 261578 entry-rxtime: 235 now-entry: 4 rxtime-txend: 62375
323453: setupRx2 txrxFlags 0x1 → 02
start single rx: now-rxtime: 4
324085: RXMODE_SINGLE, freq=923300000, SF=9, BW=125, CR=4/5, IH=0
rxtimeout: entry: 325893 rxtime: 324078 entry-rxtime: 1815 now-entry: 4 rxtime-txend: 124875
325910: processRx2DnData txrxFlags 0x2 → 00
325970: processDnData_norx txrxFlags 00 → 20
EV_TXCOMPLETE (includes waiting for RX windows)
Next LoRa packet scheduled in 480 seconds!
327004: engineUpdate, opmode=0x900
ts Jun 8 2016 00:22:57
## rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0018,len:4
load:0x3fff001c,len:1216
ho 0 tail 12 room 4
load:0x40078000,len:9720
ho 0 tail 12 room 4
load:0x40080400,len:6364
entry 0x400806b8
LoRa & GSM based TTN car tracker
BME280 initialized sucessfully
BMP/BME280: normal mode, 16x pressure / 2x temperature / 1x humidity oversampling,
0.5ms standby period, filter 16x
Initializing LoRa module
RXMODE_RSSI
Ready to track
Battery voltage: 4.05V
Temperature = 25.22C, Pressure = 996.73hPa, Approx. Altitude = 138.46m, Humidity = 59.15%
Valid gps Fix.
Lat: -33.653073
Lng: 151.131725
Alt: 206.000000 meters
Speed: 0.259280 km/h
Sats: 11
193620: engineUpdate, opmode=0x808
Unknown event
193800: TXMODE, freq=917800000, len=43, SF=7, BW=125, CR=4/5, IH=0
30 bytes long LPP packet queued.
261015: setupRx1 txrxFlags 00 → 01
start single rx: now-rxtime: 3
261647: RXMODE_SINGLE, freq=926300000, SF=7, BW=500, CR=4/5, IH=0
rxtimeout: entry: 261875 rxtime: 261640 entry-rxtime: 235 now-entry: 3 rxtime-txend: 62375
323515: setupRx2 txrxFlags 0x1 → 02
start single rx: now-rxtime: 3
324146: RXMODE_SINGLE, freq=923300000, SF=9, BW=125, CR=4/5, IH=0
rxtimeout: entry: 325955 rxtime: 324140 entry-rxtime: 1815 now-entry: 3 rxtime-txend: 124875
325971: processRx2DnData txrxFlags 0x2 → 00
326032: processDnData_norx txrxFlags 00 → 20
EV_TXCOMPLETE (includes waiting for RX windows)
Next LoRa packet scheduled in 480 seconds!
327066: engineUpdate, opmode=0x900
Battery voltage: 3.40V
Temperature = 25.10C, Pressure = 996.81hPa, Approx. Altitude = 137.79m, Humidity = 59.49%
Valid gps Fix.
TXMODE, freq=921200000,Any help would be greatly appriciated