Issue: SX1272MB2xAS not connecting with OTAA and TTN

Hi,

I’m trying to use the lora shield SX1272MB2xAS with a Nucleo F429ZI and connect it to the things network and it’s not working. I use the mbed-os-example-lorawan . I already use this example with a disco L072CZ LRWAN1 and it connects to TTN without any problems. To use the SX1272MB2xAS, I have modified the mbed_app.json with the folowing configuration:

{

"config": {

"lora-radio": {

"help": "Which radio to use (options: SX126X, SX1272, SX1276) See config/ dir for example configs",

"value": "SX1272"

},

"main_stack_size": { "value": 4096 },

"lora-spi-mosi": { "value": "NC" },

"lora-spi-miso": { "value": "NC" },

"lora-spi-sclk": { "value": "NC" },

"lora-cs": { "value": "NC" },

"lora-reset": { "value": "NC" },

"lora-dio0": { "value": "NC" },

"lora-dio1": { "value": "NC" },

"lora-dio2": { "value": "NC" },

"lora-dio3": { "value": "NC" },

"lora-dio4": { "value": "NC" },

"lora-dio5": { "value": "NC" },

"lora-rf-switch-ctl1": { "value": "NC" },

"lora-rf-switch-ctl2": { "value": "NC" },

"lora-txctl": { "value": "NC" },

"lora-rxctl": { "value": "NC" },

"lora-ant-switch": { "value": "NC" },

"lora-pwr-amp-ctl": { "value": "NC" },

"lora-tcxo": { "value": "NC" }

},

"target_overrides": {

"*": {

"mbed-trace.enable": true,

"platform.stdio-convert-newlines": true,

"platform.stdio-baud-rate": 115200,

"platform.default-serial-baud-rate": 115200,

"lora.over-the-air-activation": true,

"lora.duty-cycle-on": true,

"lora.phy": "EU868",

"lora.device-eui": "{My device EUI }",

"lora.application-eui": "{ My App EUI }",

"lora.application-key": "{ My App key }"

},

"K64F": {

"lora-spi-mosi": "D11",

"lora-spi-miso": "D12",

"lora-spi-sclk": "D13",

"lora-cs": "D10",

"lora-reset": "A0",

"lora-dio0": "D2",

"lora-dio1": "D3",

"lora-dio2": "D4",

"lora-dio3": "D5",

"lora-dio4": "D8",

"lora-dio5": "D9",

"lora-rf-switch-ctl1": "NC",

"lora-rf-switch-ctl2": "NC",

"lora-txctl": "NC",

"lora-rxctl": "NC",

"lora-ant-switch": "A4",

"lora-pwr-amp-ctl": "NC",

"lora-tcxo": "NC"

},

"NUCLEO_F429ZI": {

"lora-radio": "SX1272",

"lora-spi-mosi": "D11",

"lora-spi-miso": "D12",

"lora-spi-sclk": "D13",

"lora-cs": "D10",

"lora-reset": "A0",

"lora-dio0": "D2",

"lora-dio1": "D3",

"lora-dio2": "D4",

"lora-dio3": "D5",

"lora-dio4": "NC",

"lora-dio5": "NC",

"lora-rf-switch-ctl1": "NC",

"lora-rf-switch-ctl2": "NC",

"lora-txctl": "NC",

"lora-rxctl": "NC",

"lora-ant-switch": "NC",

"lora-pwr-amp-ctl": "NC",

"lora-tcxo": "NC",

"target.d11_configuration": "PB_5"

},

},

"macros": ["MBEDTLS_USER_CONFIG_FILE=\"mbedtls_lora_config.h\""] }

When I start the program with the trace enable, it seems to work, I get some debug message transmission complete but the OTAA doesn’t work and I’am never connected with TTN.

Is there a bug with the library or should I do something else?

Thank’s in advance for your replies