diff --git a/libraries/Wire/src/Wire.cpp b/libraries/Wire/src/Wire.cpp
index b95cb04778..dc9d14ba30 100644
--- a/libraries/Wire/src/Wire.cpp
+++ b/libraries/Wire/src/Wire.cpp
@@ -117,6 +117,10 @@ void TwoWire::end(void)
void TwoWire::setClock(uint32_t frequency)
{
i2c_setTiming(&_i2c, frequency);
+ if (_i2c.isMaster == 0) {
+ i2c_attachSlaveTxEvent(&_i2c, onRequestService);
+ i2c_attachSlaveRxEvent(&_i2c, onReceiveService);
+ }
}
uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity, uint32_t iaddress, uint8_t isize, uint8_t sendStop)
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