diff --git a/rfm12b_recv_xxxx/README.md b/rfm12b_recv_xxxx/README.md
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+## Arduino relay between RFM12b and ThingSpeak
+
+This is the sketch for the Arduino pro mini with the RFM12b module.
+
+See http://robertoostenveld.nl/arduino-relay-rfm12b-thingspeak/ for details.
diff --git a/rfm12b_thingspeak/README.md b/rfm12b_thingspeak/README.md
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+## Arduino relay between RFM12b and ThingSpeak
+
+This is the sketch for the Arduino Uno with the Ethershield.
+
+See http://robertoostenveld.nl/arduino-relay-rfm12b-thingspeak/ for details.