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:
4:df442e6af8cf
Parent:
0:7037ed05f54f
Child:
13:2f387d100e5b
--- a/mbed-lora-radio-drv.lib	Sun Mar 11 09:45:20 2018 +0000
+++ b/mbed-lora-radio-drv.lib	Sun Mar 11 10:15:17 2018 +0000
@@ -1,1 +1,1 @@
-https://github.com/ARMmbed/mbed-semtech-lora-rf-drivers#94b11beea518161e4d21aa1f437a4ed1d1cf0f61
+https://github.com/ARMmbed/mbed-semtech-lora-rf-drivers#c5ee52293fee29aea3479d20e92ca2c1fc1ddaff