add kiss radio env to most of the variants

variants/thinknode_m3/platformio.ini

@@ -17,11 +17,11 @@ build_flags = ${nrf52_base.build_flags}
   -D RF_SWITCH_TABLE
   -D RX_BOOSTED_GAIN=true
   -D P_LORA_BUSY=43
-  -D P_LORA_SCLK=45 
+  -D P_LORA_SCLK=45
   -D P_LORA_NSS=44
   -D P_LORA_DIO_1=40
   -D P_LORA_MISO=47
-  -D P_LORA_MOSI=46 
+  -D P_LORA_MOSI=46
   -D P_LORA_RESET=42
   -D P_LORA_TX_LED=PIN_LED_BLUE
   -D P_LORA_TX_LED_ON=LOW
@@ -119,3 +119,10 @@ lib_deps = ${ThinkNode_M3.lib_deps}
   densaugeo/base64 @ ~1.4.0
   stevemarple/MicroNMEA @ ^2.0.6
   end2endzone/NonBlockingRTTTL@^1.3.0
+
+[env:ThinkNode_M3_kiss_modem]
+extends = ThinkNode_M3
+build_src_filter = ${ThinkNode_M3.build_src_filter}
+  +<../examples/kiss_modem/>
+lib_deps = ${ThinkNode_M3.lib_deps}
+  stevemarple/MicroNMEA @ ^2.0.6