update readme.md, keywords (#12)

RobTillaart · Dec 28, 2020 · 31d4be2 · 31d4be2
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diff --git a/README.md b/README.md
@@ -17,9 +17,10 @@ of 2.7V .. 5.5V. Check datasheet for the details.
 
 
 - **MCP4725(deviceAddress)** Constructor, needs I2C address
-- **begin(dataPin, clockPin)** for ESP32
-- **begin()** for UNO and other boards with hard wired I2C pins.  
+- **begin(dataPin, clockPin)** for ESP32. Returns true if connected.
+- **begin()** for UNO and other boards with hard wired I2C pins. Returns true if connected.
 Only suppport for Wire so not for Wire1 or Wire2 etc
+- **isConnected()** returns true if device (address) can be seen on the I2C bus.
 - **setValue(value)** value = 0 .. 4095  
 Uses writeFastMode and does not write to EEPROM.
 Therfore it does not update the lastWriteEEPROM timestamp.

diff --git a/keywords.txt b/keywords.txt
@@ -5,6 +5,7 @@ MCP4725	KEYWORD1
 
 # Methods and Functions (KEYWORD2)
 begin	KEYWORD2
+isConnected	KEYWORD2
 read	KEYWORD2
 setValue	KEYWORD2
 getValue	KEYWORD2