diff --git a/README.md b/README.md
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@@ -77,6 +77,27 @@ You will find a link next to the parts name. **I do not have any partner ships w
 ## Configuration options :
 You may change some settings present in the ***definition.h*** file located in the "src/app" folder.
 
+Set **MAX_SEND_ROUND_RETRIES** to the number of send retries the device will perform if no ACK is received.  
+Default is 5, increase this parameter if the RF link between the device and the receiving station is bad.  
+This may increase power consumption, but it's better to receive the message than to save power.
+
+Set **SERIAL_DEBUG_ENABLED** to **1** to get debug output on the serial console.
+
+Set **SERIAL_BAUD_RATE** to the desired baudrate for debugging.
+
+Set **ADC_QUANTUM** to adjust the quantum if your VREF is not the same as mine.<br />
+To do so, measure which voltage does the VCC pin of your Arduino board output and divide it by 1024 (10 bit ADC resolution).
+
+Set **VOLTAGE_DIV_COEFF** to something different if you changed the voltage divider resistor values.
+
+Set **RADIO_CHANNEL** to the NRF's RF channel (between 0 and 124). **Do not forget to set the receiver station up on the same channel**
+
+Set **RADIO_NODE_ADDRESS** to change it's 5 byte address if you feel like it. **Do not forget to set the receiver station up on the same address**
+
+Set **RADIO_PA_LEVEL** to adjust the transmit power level if needed (higher the power, higher the current consumption)
+
+Set **ENABLE_LNA** to true or false to enable or disable the Low Noise Amplifier on the NRF modules if it has one.
+
 ***If you have any questions, do not hesitate to contact me at : bugreport[at]laposte[dot]net***
 
 ## Finally here are some pictures of the PCB, reed switches setup and mailbox :