diff --git a/hardware/arduino/esp8266/cores/esp8266/i2c.cpp b/hardware/arduino/esp8266/cores/esp8266/i2c.cpp
index 86da61f98..063593acb 100644
--- a/hardware/arduino/esp8266/cores/esp8266/i2c.cpp
+++ b/hardware/arduino/esp8266/cores/esp8266/i2c.cpp
@@ -71,7 +71,7 @@ static inline uint8_t i2c_get_scl()
 
 static inline void i2c_wait()
 {
-	delayMicroseconds(5);
+	delayMicroseconds(s_i2c_delay);
 }
 
 void i2c_freq(int freq_hz)
diff --git a/hardware/arduino/esp8266/variants/wifio/WifioWiring.cpp b/hardware/arduino/esp8266/variants/wifio/WifioWiring.cpp
index f66fdae19..e487eb268 100644
--- a/hardware/arduino/esp8266/variants/wifio/WifioWiring.cpp
+++ b/hardware/arduino/esp8266/variants/wifio/WifioWiring.cpp
@@ -115,5 +115,6 @@ extern "C" void analogWrite(uint8_t pin, int value) {
 
 void initVariant() 
 { 
+  i2c_freq(100000);
   i2c_init(SDA, SCL);
 }