Page 222 - Programming the Photon Getting Started With the Internet of Things
P. 222
working with GPIO pins, 16–17
Tip tinner, soldering and, 151
Tokens, in security device, 91
Transistors, multimeter features for, 147–148
Transmitter (Tx), header pins for serial/UART, 10
Triggers:
in e-mail alert application, 128–130
in Twitter alert application, 137–138
Troubleshooting devices:
device modes and, 141–143
mode issues, 143–144
overview of, 141
summary, 143–144
Troubleshooting Photon board, 13
true/false values, in Booleans, 36–37
Twitter:
IFTTT (“if this then that”) alert example, 133–139
IFTTT integration with, 125
Tx (transmitter), header pins for serial/UART, 10
U
UART (Universal Asynchronous Receiver Transmitter):
FT2232H chip and, 118
header pins for, 10
Ultrasonic range finder, measuring distance with HC-SR04 sensor, 105–109
Uniform resource locator (URL), issuing HTTP GET requests in browser, 96–97
URL (uniform resource locator), issuing HTTP GET requests in browser, 96–97
USB:
board features, 7
connecting to Wi-Fi network, 14–15
