SHELL>> ir_pwm
IR LED Brightness is currently set to: 20
Figure 59. IR LED power commands
6.7.2 White LED
The VIZN3D board embeds two white LEDs controlled by an LED driver which can be used to modulate their power according
to lighting conditions. The RT117F uses a PWM signal with a configurable duty cycle set by a serial command to control the
LED driver.
To change the power emitted by the White LEDs, type the command “white_pwm” followed by a value between 0 and 100.
The White LEDs can be harmful for the human eye so we recommend not to exceed 35% power and never look
at the White LEDs directly.
CAUTION
SHELL>> white_pwm 20
Brightness set
SHELL>> white_pwm
White LED Brightness is currently set to: 20
Figure 60. IR LED power command
6.8 Configure automatic low-power mode
The SLN-VIZN3D-IOT has been optimized for battery powered applications in part by supporting the ability to enter a low-power
state either manually, using a pushbutton, or automatically using a combination of timers and other triggers. For more information
regarding low-power mode, see
.
To control the Lower Power Timer enter the Serial command “lpm” with the argument enable or disable to activate or deactivate it.
SHELL>> lpm enable
SHELL>> lpm disable
Figure 61. Control low-power timer command
To get the current Lower Power Timer mode, type the command “lpm” without any arguments.
SHELL>> lpm
lpm enable
Figure 62. Status low-power timer command
6.9 Debug logging messages
To help developers understand how our solution operates, the Smart Lock application preprogrammed on the kit offers five levels
of log messages: none, error, debug, info, and verbose.
NXP Semiconductors
Additional features
SLN-VIZN3D-IOT Kit User Guide, Rev. 0, 01 November 2021
User Guide
36 / 47
