8-channel Relay Board with DIP switch for stacking additional Flux boards together on the same bus. Relays are ordered in a counterclockwise fashion starting from GPIO496, which is the first relay on the top left closest to the DIP switch. GPIOs may change their numbering based on the DIP switch setting:
Interfaces
GPIOs - Relay gpio controls, active low
DIP GPIO Switch Ranges
000 => 496..503
100 => 480..487
010 => 464..474
001 => 448..455
uEnv.txt entry:
Driver appears as exportable GPIO chips on the board. Check /sys/class/gpio/ for gpiochip496 entry.
Example script for toggling relays:
Horizon Lite (Rev C)
Interfaces
/dev/ttyS3 - Cell Module Serial Port
/dev/ttyS1 - (J15) RS-422/485 Serial Interface
Note includes 120 Ohm termination resistors - R54/55
Check name = ad7091r8 to ensure correct ADC is enumerated
Check ~/provisioning.txt for calibrated channel values
uEnv.txt entry:
ADC Communication
Getting ADC values - Basic
8 channels available from 0 to 7
J16 pin order - looking directly at the connector on the side
Example counts->milliamps formula using point-slope formulae
%FS can be directly multiplied by the full scale to get the measured value. For instance, a 0-10,000 PSI sensor would measure 6,790 PSI at the above measurement.
RS-422 Communication
Testing Serial Output - Basic
Basic Cell Communication
AT Commands
AT - comms check - responds with OK
AT+CREG? - modem registration check
0,1 - registered home
0,2 - searching
0,3 - registration failed, not searching, check CEREG and CGREG if registered on different band
0,5 - registered roaming
AT+CEREG? - LTE modem registration check
AT+CGREG? - LTE modem registration check
AT+COPS? - operator check
AT+CSQ - signal quality, see modem AT command datasheet for specific ranges
AT+CGDCONT? - show pdp context list
the PDP context needs to be set for the SIM card so that network registration can take place
AT+CPIN? - check if SIM card is correctly inserted and ready
