[Nicolas Alberto]

Try that

Edit the init file for ppp service that starts the cellular connection
nano /etc/init.d/ppp
Add this line just before line 15 where you see “/etc/ppp/ppp_on_boot”
sleep 30
This make the script wait a little before starting the ppp_on_boot script. I had an issue without this extra line and the service was not starting at boot time.
Save the file

Now this makes the ppp service start at boot time
update-rc.d ppp defaults

[Nicolas Alberto]

Thank a lot
I have used some of the code provided and adapted it to make it work for the lora demo.

Here is the code to import into node red if someone else need this functionality

[{"id":"2d94ec93.0f2ed4","type":"function","z":"1ce26990.3fbf36","name":"MtDot Payload Decrypt","func":"var data_type = {\n\tnone : 0x00,\n\tled1 : 0x01,\n\tled2 : 0x02,\n\tlux_max : 0x03,\n\tlux_min : 0x04,\n\tlux_curr : 0x05,\n\tbaro_max : 0x06,\n\tbaro_min : 0x07,\n\tbaro_curr : 0x08,\n\ttemp_max : 0x09,\n\ttemp__min : 0x0A,\n\ttemp_curr : 0x0B,\n\taccel_max : 0x0C,\n\taccel_min : 0x0D,\n\taccel_curr : 0x0E,\n\tconfiguration : 0x0F,\n\tgpio_in : 0x10,\n\tgpio_out : 0x11,\n\tcurrent_max : 0x12,\n\tcurrent_min : 0x13,\n\tcurrent_curr : 0x14,\n\tgps_latitude : 0x15,\n\tgps_longitude : 0x16,\n\tgps_time : 0x17,\n\tgps_date : 0x18,\n\tgps_lock : 0x19,\n\tqos_up : 0x1A,\n\tqos_dwn : 0x1B,\n\trf_out : 0x1C,\n\tdata_mark : 0x1D,\n};\n\nvar data_struc = {\n\tdata_valid : 0,\n\tblock_start :0,\n\ttemperature : 0,\n\tx_pos : 0,\n\ty_pos : 0,\n\tz_pos : 0,\n\tbaro_pressure : 0,\n\tlux : 0,\n\tpkt_timer :0,\n\trf_pwr : 0,\n\tsf_val : 0,\n\trssi_up : 0,\n\tsnr_up : 0,\n\trssi_dwn : 0,\n\tsnr_dwn :0 ,\n\tlat_deg : 0 ,\n\tlat_min : 0,\n\tlong_deg : 0,\n\tlong_min : 0,\n\tnum_sats : 0 ,\n\tgps_status : 0,\n};\n\n//context.global.data_out = context.global.data_out || data_struc;\nvar pData = {};\n\nvar msg_pntr = 0;\nvar temp = 0;\n\nwhile (msg_pntr < msg.payload.length){\n\tswitch (msg.payload[msg_pntr]){\n\tcase data_type.lux_max:\n\tcase data_type.lux_min:\n\tcase data_type.lux_curr:\n\t\tpData.lux = msg.payload[++msg_pntr] << 8 \n\t\tpData.lux |= msg.payload[++msg_pntr];\n\t\tpData.lux = pData.lux * 0.24;\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.baro_max:\n\tcase data_type.baro_min:\n\tcase data_type.baro_curr:\n\t\tpData.baro_pressure = msg.payload[++msg_pntr]<<16;\n\t\tpData.baro_pressure |= msg.payload[++msg_pntr]<<8;\n\t\tpData.baro_pressure |= msg.payload[++msg_pntr];\n\t\tpData.baro_pressure = pData.baro_pressure * 0.25;\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.accel_max:\n\tcase data_type.accel_min:\n\tcase data_type.accel_curr:\n\t\tpData.x_pos = ((msg.payload[++msg_pntr] << 24) >> 24) * 0.0625;\n\t\tpData.y_pos = ((msg.payload[++msg_pntr] << 24) >> 24) * 0.0625;\n\t\tpData.z_pos = ((msg.payload[++msg_pntr] << 24) >> 24) * 0.0625;\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.temp_min:\n\tcase data_type.temp_max:\n\tcase data_type.temp_curr:\n\t\tpData.temperature = msg.payload[++msg_pntr] << 24;\n\t\tpData.temperature |= msg.payload[++msg_pntr] << 16;\n\t\tpData.temperature = (pData.temperature >> 16) * .0625;\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.configuration:\n\t\tpData.pkt_timer = msg.payload[++msg_pntr];\n\t\tmsg_pntr++\n\t\tbreak;\n\tcase data_type.current_max:\n\tcase data_type.current_min:\n\tcase data_type.current_curr:\n\t\tmsg_pntr++;\n\t\tmsg_pntr++;\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.gps_latitude:\n\t\tpData.lat_deg = (msg.payload[++msg_pntr] << 24) >> 24;\n\t\tpData.lat_min = msg.payload[++msg_pntr];\n\t\ttemp = msg.payload[++msg_pntr] << 8 \n\t\ttemp |= msg.payload[++msg_pntr];\n\t\tpData.lat_min = pData.lat_min + (temp * 0.0001);\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.gps_longitude:\n\t\tpData.long_deg = (msg.payload[++msg_pntr] << 24);\n\t\tpData.long_deg |= (msg.payload[++msg_pntr] << 16);\n\t\tpData.long_deg = pData.long_deg >> 16;\n\t\tpData.long_min = msg.payload[++msg_pntr];\n\t\ttemp = msg.payload[++msg_pntr] << 8 \n\t\ttemp |= msg.payload[++msg_pntr];\n\t\tpData.long_min = pData.long_min + (temp * 0.0001);\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.gps_time:\n\t\tmsg_pntr++;\n\t\tmsg_pntr++;\n\t\tmsg_pntr++;\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.gps_date:\n\t\tmsg_pntr++;\n\t\tmsg_pntr++;\n\t\tmsg_pntr++;\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.gps_lock:\n\t\tmsg_pntr++;\n\t\tpData.gps_status = msg.payload[msg_pntr] & 0x0F;\n\t\tpData.num_sats = msg.payload[msg_pntr++] >> 4;\n\t\tbreak;\n\tcase data_type.qos_up:\n\t\tpData.rssi_up = msg.payload[++msg_pntr] << 24;\n\t\tpData.rssi_up |= msg.payload[++msg_pntr] << 16;\n\t\tpData.rssi_up = pData.rssi_up >> 16;\n\t\tpData.snr_up = (msg.payload[++msg_pntr] << 24) >> 24;\n\t\tpData.rf_pwr = (msg.payload[++msg_pntr] << 24) >> 24;\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.qos_dwn:\n\t\tpData.rssi_dwn = msg.payload[++msg_pntr] << 24;\n\t\tpData.rssi_dwn |= msg.payload[++msg_pntr] << 16;\n\t\tpData.rssi_dwn = pData.rssi_dwn >> 16;\n\t\tpData.snr_dwn = ((msg.payload[++msg_pntr] << 24) >> 24) / 4;\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.rf_out:\n\t\tpData.rf_pwr = (msg.payload[++msg_pntr] << 24) >> 24;\n\t\tmsg_pntr++;\n\t\tbreak;\n\tcase data_type.data_mark:\n\t\tif (msg_pntr == 0) {\n\t\t\tpData = data_struc;\n\t\t\tpData.block_start = 1;\n\t\t\tmsg_pntr++;\n\t\t}\n\t\telse if (msg_pntr == (msg.payload.length - 1) && (pData.block_start === 1)) {\n\t\t\t\tpData.data_valid = 1;\n\t\t\t\tmsg_pntr++;\n\t\t\t}\n\t\t\telse {\n\t\t\t\tpData = data_struc;\n\t\t\t\tmsg_pntr = msg.payload.length;\n\t\t\t\t}\n\t\tbreak;\n\tdefault:\n\t\tpData = data_struc;\n\t\tmsg_pntr = msg.payload.length;\n\t}\n}\n\n\nmsg.payload = pData;\n//msg.payload = {\"x_pos\":-0.0625,\"y_pos\":0,\"z_pos\":0.9375,\"baro_pressure\":101314,\"lux\":36.96,\"temperature\":24.8125};\nreturn msg;","outputs":1,"noerr":0,"x":372,"y":103,"wires":[[]]}]

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