diff --git a/FSK4_Mod.ino b/FSK4_Mod.ino
old mode 100644
new mode 100755
index 6678854..dc74769
--- a/FSK4_Mod.ino
+++ b/FSK4_Mod.ino
@@ -55,11 +55,11 @@ int16_t fsk4_transmitDirect(PhysicalLayer* phy, uint32_t freq) {
 }
 
 void fsk4_tone(PhysicalLayer* phy, uint8_t i) {
-  uint32_t start = Module::micros();
+  uint32_t start = micros();
   fsk4_transmitDirect(phy, fsk4_base + fsk4_tones[i]);
   //delayMicroseconds(fsk4_bitDuration);
-  while(Module::micros() - start < fsk4_bitDuration) {
-    Module::yield();
+  while(micros() - start < fsk4_bitDuration) {
+    yield();
   }
 }
 
@@ -94,7 +94,7 @@ size_t fsk4_writebyte(PhysicalLayer* phy, uint8_t b){
   return(1);
 }
 
-void fsk4_write(PhysicalLayer* phy, uint8_t* buff, size_t len){
+size_t fsk4_write(PhysicalLayer* phy, char* buff, size_t len){
   size_t n = 0;
   for(size_t i = 0; i < len; i++) {
     n += fsk4_writebyte(phy, buff[i]);
diff --git a/horusbinary_radiolib.ino b/horusbinary_radiolib.ino
index dcd22ad..9c71fcd 100644
--- a/horusbinary_radiolib.ino
+++ b/horusbinary_radiolib.ino
@@ -163,7 +163,7 @@ void setup() {
   // (RF69, CC1101, Si4432 etc.), use the basic begin() method
   // int state = radio.begin();
 
-  if(state == ERR_NONE) {
+  if(state == RADIOLIB_ERR_NONE) {
     Serial.println(F("success!"));
   } else {
     Serial.print(F("failed, code "));
@@ -189,7 +189,7 @@ void setup() {
 
   state = fsk4_setup(&radio, TX_FREQ, FSK4_SPACING, FSK4_BAUD);
 
-  if(state == ERR_NONE) {
+  if(state == RADIOLIB_ERR_NONE) {
     Serial.println(F("success!"));
   } else {
     Serial.print(F("failed, code "));