diff --git a/components/cc1101/cc1101.c b/components/cc1101/cc1101.c
index 9fa43d4..1eb7de4 100644
--- a/components/cc1101/cc1101.c
+++ b/components/cc1101/cc1101.c
@@ -139,7 +139,7 @@ void cc_enter_idle_mode(void) {
 void cc_enter_rx_mode(void) {
   while ( CC_STATE( cc_strobe( CC_SIDLE ) ) != CC_STATE_IDLE ){}
 
-  cc_write( CC_IOCFG0, 0x2E );      // GDO0 not needed
+  cc_write( CC_IOCFG0, 0x09 );      // Show Clear Channel Assessment
   cc_write( CC_PKTCTRL0, 0x32 );	// Asynchronous, infinite packet
 
   cc_strobe( CC_SFRX );
diff --git a/components/cc1101/cc1101_param.c b/components/cc1101/cc1101_param.c
index 4b8540f..e3e9be4 100644
--- a/components/cc1101/cc1101_param.c
+++ b/components/cc1101/cc1101_param.c
@@ -37,7 +37,7 @@ static inline uint8_t cc1101_cfg_default( uint8_t *cfg ) {
     0xF8,  //  CC_MDMCFG0   Channel spacing 199.951 KHz
     0x50,  //  CC_DEVIATN
     0x07,  //  CC_MCSM2     default
-    0x30,  //  CC_MCSM1     default
+    0x10,  //  CC_MCSM1     CCA if RSSI below threshold
     0x18,  //  CC_MCSM0     Auto-calibrate on Idle to RX+TX, Power on timeout 149-155 uS
     0x16,  //  CC_FOCCFG    default
     0x6c,  //  CC_BSCFG     default