![]() If i just approach my hand near the keyboard, the whole thing goes berserk, which usually means pullups arent working. PreviousKbState = currentKbState // set the state for the next cycle If (currentKbState != previousKbState ) // compare with previous state. Temp =digitalRead(kbLigne) //read each ligne Power Pins: Arduino Mega 2560 Rev3 have several power pins, including 3.3V and 5V pins, which can be used to power other devices or sensors. Now I wish to do the same on Arduino Mega 2560 Board. That sketch uses and .put your main code here, to run repeatedly:ÄigitalWrite(kbColonne,LOW) // in that state, any kbLigne should be at HIGH with the pullups, and at LOW when a touch is pressedÄelay(2) // time seen with the scope to get a clean change Hi, I have developed a sketch working on Arduino UNO, to enable interrupts on the following pins: D4, D12, A0-A5. digitalWrite(kbLigne,HIGH) // does not work either when i used the DHT11 with my arduino uno everything worked excellent. I also have an altimeter connected (working fine) and an LCD display (from the Arduino starter kit) which uses SPI. pinMode(kbLigne, INPUT) // second method to set pullups For those who managed to get the DHT11 (Temperature & Humidity digital sensor) working with the Arduino MEGA2560, let me tell you : GREAT, YOURE A BOSS P.S. I have an Arduino Mega 2560 Rev3 stacked with a Gravity Expansion shield by DF Robot, which has a built in micro SD module. It has a USB host interface to connect with Android based phones, based on the MAX3421e IC. Connect the A0-pin to GND check that the Serial Moroni shows 0. The Arduino MEGA ADK is a microcontroller board based on the ATmega2560. Pin D0 UART1TXPIN Pin D18 UART1RXPIN Pin D19 UART2TXPIN Pin D16 UART2RXPIN Pin D17 UART3TXPIN Pin D14 UART3RXPIN Pin D15 ) UART pins. Check that the Serial Monitor shows about 675 (1023/53.3 675). Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. ![]() PinMode(kbLigne, INPUT_PULLUP) // first method, doest not work Functional Test of Ch-0 using Arduino Instructions Upload the following sketch in the MEGA Board, Short A0-pin to 3.3V point of the MEGA. put your setup code here, to run once: The board has an ethernet shield, not used in this example. the first 4 are the output of the KB (ie the inputs of the arduino), the next 4 are the input of the KB (ie the outputs of the arduino). I tried to narrow it down in a separate file,so i am only using 1 output line instead of 4. ![]()
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