Low-Power Camera Mainboard

Product Details

Mainboard Overview

This mainboard uses an LTE Cat.1 bis communication module and is powered by a 3.6-4.2V lithium battery with a built-in chip antenna. It is mainly intended for battery-powered scenarios in which a camera photographs a dial to read its parameters.

Functions

• 4G full-network compatibility
• Low-power active sleep
• 300,000-pixel photo capture and remote transmission
• Built-in flash
• Acquisition parameters configurable through a cloud platform (after a theoretical accumulation of 200 devices)
• Periodic sleep with timed wake-up
• External-trigger wake-up
• Timed image push over HTTP

Interfaces

The mainboard provides the following X2.54 connectors:

• Battery power input

The interface diagram is shown below:

Operating Logic

1. Update and save the configuration on the platform
2. Wake up the device
3. The device automatically pulls the updated configuration
4. Restart
5. Connect to the network -> on success -> take a photo -> upload to the cloud
6. On completion, sleep and wait for the next cycle (automatic task interval: in minutes)

Sleep parameter configuration:

It is recommended to use a value within 1 hour that is a multiple of 5, or a multiple of 60 minutes.

In this way the mainboard actively aligns the timing, making the reporting times more presentable from a business perspective.

For example, if the sleep parameter is set to 10 minutes, the device wakes up and starts working at 0, 10, 20, 30, 40 and 50 minutes of every hour.

Indicator logic:

1. During network connection the indicator blinks rapidly; on success it stays on; on failure it turns off, the device sleeps and retries after 10 minutes.
2. After data is reported the indicator blinks, then the device sleeps.
3. The indicator only blinks on restart or wake-up. By default it does not blink, to save power.

Power Consumption Test

Scenario 1:

One acquisition every 5 minutes, sleeping immediately after each acquisition, 12 acquisitions in total, then reporting (one network report per hour).

Using a 1 uA low-power Hall element.

24-hour power consumption monitoring is shown below:

Scenario 2:

One acquisition every 5 minutes, sleeping immediately after each acquisition, 12 acquisitions in total, then reporting (one network report per hour).

Using a 3 uA low-power Hall element.

** If Hall wake-up is removed, sleep power consumption can be controlled within 3 uA.

30-hour power consumption monitoring is shown below:

Technical Specifications

Item	Description
CPU	Cortex M3 @ 204MHz, 16KB ICache
Flash	Nor Flash 4MB
RAM	PSRAM > 1Mb
Supported bands	LTE-FDD: B1/B3/B5/B8; LTE-TDD: B34/B38/B39/B40/B41
Transmit power	LTE-FDD: Class3 (23dBm +-2dB); LTE-TDD: Class3 (23dBm +1/-3dB)
LTE features	Up to non-CA CAT1; 1.4-20MHz RF bandwidth; LTE-FDD: max uplink 5Mbps, max downlink 10Mbps; LTE-TDD (UL/DL config 1): max uplink 4Mbps, max downlink 6Mbps; LTE-TDD (UL/DL config 2): max uplink 2Mbps, max downlink 8Mbps
Power supply	3.3V ~ 4.3V, typical 3.8V
Temperature range	Normal operating: -35 degC to +70 degC; extreme operating: -40 degC to +85 degC
RoHS	All components fully RoHS compliant
Hall element	1 uA - 4 uA standby power consumption

Camera Parameters

Item	Description
Driver	GC032A
Lens	5 cm object distance, 130-degree lens
Resolution	640 x 480
Image format	JPEG

Power Consumption

Item	Value
Sleep / standby	< 10 uA
Normal operation	100-600 mA

Customization

The following customizations are supported:

• Hall wake-up or mechanical switch (button) wake-up
• Specified enclosure design