diff --git a/libraries/AP_HAL_ChibiOS/hwdef/MatekH7A3/defaults.parm b/libraries/AP_HAL_ChibiOS/hwdef/MatekH7A3/defaults.parm
new file mode 100644
index 0000000000000..5c263ec90dbf7
--- /dev/null
+++ b/libraries/AP_HAL_ChibiOS/hwdef/MatekH7A3/defaults.parm
@@ -0,0 +1,14 @@
+CAN_D1_PROTOCOL 1
+CAN_P1_DRIVER   1
+
+# Serial Port defaults
+SERIAL1_PROTOCOL  2   # mavlink2  w/DMA
+SERIAL2_PROTOCOL  23  # RC INPUT  w/DMA
+SERIAL3_PROTOCOL  5   # GPS       w/DMA
+SERIAL4_PROTOCOL -1  
+SERIAL5_PROTOCOL -1
+SERIAL6_PROTOCOL -1  
+
+SERIAL1_BAUD 57
+SERIAL2_BAUD 115
+SERIAL3_BAUD 57