The first 24 loops or so runs at the intended speed (variable wait), but then the speed slows down considerably - for time stamps (millis) see below. to wait 30-60 seconds for the PIR to adapt to the infrared energy in the room. Without this initial setting, they would off until the first time changeLights runs. I used the button example the arduino software provides,then included a delay in the sequence. I have a rather simple Arduino sketch (see below) for an Uno3, which in the main loop reads a number of sensors and serial.prints (sends) the result (as characters) to the serial port at 9600 baud. This tutorial includes working, Pinout, Wiring/Schematic, Arduino Code. But every 5 seconds there is a 0.3 seconds lag in the transmission. The module transmits the data (a string that is read by the RacaChrono app on my phone) at 20 Hz (the frequency can be changed). Add a line to set the traffic lights to the green stage. have a HC-05 module hooked up to my Arduino Nano (RX-TX and TX-RX, baudrate 9600). The problem is that while I want it to happen only once every 15 minutes and for the pump to operate for 30 seconds only, yet the device seems to do everything 10 times as quickly, if not even faster. Now, in the setup function, add a new line to declare the switch as an input. 1 I'm making a hydroponics system that collects data and sends it to the user through a SIM module. Start by adding a new variable to store your button pin: int button = 12 // switch is on pin 12 Now, in the loop part of the code, instead of changing the lights every 15 seconds, you're going to read the state of the pushbutton switch instead, and only change the lights when it's activated. In other logic circuits, you may find a pull-up resistor instead, and this works on the same principle, but in reverse, making sure that particular logic gate defaults to high. by Matthew Ford 20th Dec 2021 (original - 21 st March 2013) © Forward Computing and Control Pty.
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