diff --git a/README.md b/README.md
index 385dc9d..5b32327 100644
--- a/README.md
+++ b/README.md
@@ -68,3 +68,11 @@ What you can do with this app:
   - Codec2 iOS wrapper: https://github.com/Beartooth/codec2-ios
 - Other interesting projects:
   - LoRa mesh text GPS communicator: https://github.com/meshtastic/Meshtastic-device
+
+# Prototypes used with this application
+ - ESP32 LoRa Bluetooth headless APRS modem (no screen and external controls): https://github.com/sh123/esp32_loraprs
+ - ESP32 LoRa DV handheld transceiver (with screen and controls): https://github.com/sh123/esp32_loradv
+ - Arduno Micro USB KISS modem (no screen and external controls): https://github.com/sh123/micro_loraprs
+  
+![alt text](images/modems.png)
+