Light on/off WiFi

Light on/off WiFi is similar to the original mode as it detects light - a message is sent every time a predefined threshold (% of light detected) is crossed either way. Can be set up to detect a very low light percentage threshold - darkness and extreme darkness (useful for monitoring package opening in the night). All mode-specific events are sent with 3 MAC addresses for better localisation precision.

Light on/off WiFi

Hex value: 0x1A

Use cases: Monitoring electricity usage, buildings and rooms, detecting opening of packages, freezers, safeboxes etc. and more

Devices that support this mode: SimplePack Plus

Required sensors: Light sensor, WiFi module

Mode-specific deltas:

Deltas are mode-specific register values different from register default values.

Register (hex)	Default (hex)	Delta (hex)	Delta information
0x04	0x41	0x06	Sleep time decreased
0x36	0x00	0x05	Light detection on

Mode-specific events (uplink messages):

For more information on what uplink messages (mode-independent events) and additional data from various sensors in the device (appended payload) can be sent regardless of mode and how to fine-tune message behavior (alerts), see Mode-independent information and events.

Hex	Event name	Alert	Event information
0x90	Light detected with WiFi 1/2	1	Light % over predefined threshold, sent with 3 MAC addresses
0x91	Light detected with WiFi 2/2	1
0x92	Darkness detected with WiFi 1/2	2	Light % under predefined threshold, sent with 3 MAC addresses
0x93	Darkness detected with WiFi 2/2	2

Registers relevant for this mode:

Hex	Register name	Default value (hex)
0x36	Light sensor measurement period	0 seconds (0x00), delta: 5 seconds (0x05)
0x43	Light sensitivity hysteresis	5% of light (0x05)
0x44	Light sensitivity threshold	30% of light (0x1A)
0x4C	Light sensor detection delay	0 seconds (0x00)

Similar modes:

Hex	Mode name	Description
0x0D	Light on/off	Original version of Light on/off, no WiFi
0x3B	Light on/off WiFi Atlas	WiFi Atlas version of Light on/off
0x56	Light on/off WiFi Precise	WiFi Precise version of Light on/off

Switching to mode, arming and disarming information:

Follow the Basic Operations With SimpleHw Devices guide, where you can also find information about LED behavior, relevant Sigfox messages and more.

Here’s what’s important for Light on/off WiFi messages:

• To set this mode, the downlink needs to include this mode register setting: 011A

• The uplink messages need to begin with the mode hex as the first byte: 1A

• When arming the device, you should see this message: 1A10

• When the device is armed, it should send you these two bytes: 1A11

• If you disarm the device via long press, you should receive this message: 1A14