mbed_app.json configured to operate on senet

To enable cayenne, edit mbed_app.json, assign pins for desired function

Example:

        "cayenne": {
            "help": "compile main_cayenne.cpp instead of main.cpp",
            "value": 1
        },
        "analog_in_pin": {
            "help": "PA_0, PA_4, PA_5",
            "value": "PA_0"
        },
        "analog_out_pin": {
            "help": "PA_0, PB_5, PB_10, PB_11",
            "value": "PB_11"
        },
        "_digital_out_pin": {
            "help": "",
            "value": ""
        }
Revision:
26:f07f5febf97f
Parent:
23:2b0d9c892149
Child:
54:19d02b47e598
--- a/mbed_app.json	Tue Jun 19 14:15:24 2018 +0100
+++ b/mbed_app.json	Thu Jun 28 12:45:20 2018 +0100
@@ -32,7 +32,7 @@
             "platform.default-serial-baud-rate": 115200,
             "lora.over-the-air-activation": true,
             "lora.duty-cycle-on": true,
-            "lora.phy": 0,
+            "lora.phy": "EU868",
             "lora.device-eui": "{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }",
             "lora.application-eui": "{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }",
             "lora.application-key": "{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }"