Low power gps module

Types of Low Power GPS Module

Low power GPS modules are available in several types, serving various applications. Outlined below are some common types:

• Cooperative GPS (C-GPS)

  Cooperative GPS, also known as C-GPS, is a low-power GPS module that gets help from the internet. This type of GPS uses information from satellites, just like regular GPS, but it also gets additional information from the internet. This makes it more accurate, especially in places where the satellite signal might not be strong enough on its own. The C-GPS is more energy efficient because it uses less power to process the location data by getting this extra help. So, it can give precise locations without using as much energy as a standard GPS would need to do all the processing by itself.

• Assisted GPS (A-GPS)

  Assisted GPS, or A-GPS, is a system that helps devices find their location quickly and accurately. It does this by using additional information from the mobile network, like the location of nearby cell towers. This is especially useful in areas where the satellite signal alone might not be enough, such as urban environments with tall buildings or rural regions with fewer satellites in sight. By connecting to the mobile network, A-GPS can download this extra data, which helps the device lock onto its position faster and with more precision. So, even in challenging environments, A-GPS ensures reliable and accurate location services.

• GPS with Low Power Microcontrollers

  Low-power microcontroller units (MCUs) are at the heart of low-power GPS devices. These MCUs are designed to consume very little energy while still performing the necessary tasks for GPS operation. They often include sleep or power-saving modes that allow them to pause or power down unnecessary functions when location updates aren't needed. By utilizing low-power MCUs, GPS devices can significantly extend battery life. This is particularly beneficial for handheld or portable GPS devices used for hiking, walking, or tracking fitness. The combination of GPS technology with low-power MCUs ensures accurate location tracking without draining the battery quickly.

• Galileo

  Galileo is Europe's global navigation satellite system, and it is designed for high precision and reliability. One of the key features of Galileo is its low-power GPS modules. This is particularly beneficial for applications in space or where power resources are limited. The Galileo satellites are equipped with advanced technologies that allow them to transmit signals with lower power requirements. This ensures that receivers can pick up and process the signals accurately, even in challenging environments. By using low-power modules, Galileo can provide accurate and reliable positioning services without needing much power, making it suitable for various applications.

Specification & Maintenance of Low Power GPS Module

Details of the specification of a low power GPS receiver are provided below.

• Power consumption

  Power consumption is as low as 10-50 mW. The GPS uses very low power, so it does not draw a lot of power from the battery.

• Supply voltage

  The GPS receiver operates on a supply voltage of 1.8V to 3.3V. This means that the GPS can be powered with very low voltages.

• Channel number

  Channel number is 12 to 66 channels. This means that the GPS can connect to 12 to 66 satellites at a time for tracking purposes.

• Tracking sensitivity

  The tracking sensitivity of a GPS module is -160 dBm. This means that the GPS can track satellites even when the signal is weak.

• Acquisition sensitivity

  Acquisition sensitivity is -148 dBm. This means that the GPS can acquire satellites even when the signal is very weak.

• Accuracy

  The accuracy of the low-power GPS module is 1.0-3.0 m, which means that the GPS can determine the location with high precision.

• Cold start time

  A cold start takes about 35 seconds to 50 seconds for the GPS to start up and connect to satellites after being turned off. This allows the GPS to quickly connect to satellites after startup.

• Warm start time

  Warm start time is about 5 seconds to 10 seconds. The GPS can quickly connect to satellites after being turned off.

• Reacquisition time

  Reacquisition time is about 1 second to 3 seconds. The GPS can reacquire satellites quickly after losing the signal.

• Position update rate

  The position update rate is 1 Hz to 10 Hz. This means that the GPS can update the location information every second to ten seconds.

• Interface

  The interface of a GPS module is UART, SPI, or I2C. This allows the GPS to communicate with other devices.

Below are the maintenance practices for low-power GPS satellite receivers:

• 1. Ensure that the satellite antennas are free from dirt and dust.
• 2. Check the satellite antennas for any signs of damage.
• 3. Ensure that the cables connecting the GPS to the antenna are not damaged.
• 4. Make sure that the GPS is receiving satellite signals by checking the signal strength.
• 5. Install any available software updates for the GPS.

How to Choose Low Power GPS Module

Choosing the right GPS module for a specific application requires careful consideration of several factors. Here are some tips to selecting the right GPS module:

• Application requirements: consider what the GPS is going to be used for. If it’s for tracking a vehicle, then the update rate and accuracy requirements will be different from a module used in agricultural equipment tracking. This is because the tracking module will need more accuracy and real-time location updates compared to the module used in agricultural equipment. The application determines the accuracy, update rate, and power constraints of the GPS module required.
• Size and form factor: consider the physical size and shape of the GPS module. Smaller modules are ideal for applications with constrained spaces or packed with other components. The form factor may require customized PCBs for mounting or specific enclosure designs.
• Power consumption: different GPS modules consume different amounts of power. It is important to understand the power constraints of the specific application. Some modules have low power consumption, while others have ultra-low power consumption. These ultra-low power modules use power-saving techniques such as sleep modes and require periodic location updates.
• Connectivity and interface: select a GPS module with an interface that is compatible with the system it will be integrated into. Common interfaces include UART, I2C and SPI. Consider the available communication protocols such as NMEA and the data format that the GPS module provides.
• Environmental considerations: take into account the environmental conditions in which the GPS module will be used. Factors such as temperature, humidity and exposure to vibration should be considered when selecting a module with suitable specifications and robustness.
• Antennas: GPS modules use different antennas. Some have built-in antennas, while others have external connectors for external antennas. Consider the module's antenna type and performance since external antennas provide better signal reception in areas with obstructed views.
• Mounting options: Different GPS modules come with various mounting options. Some are suitable for surface mounting, while others are designed for through-hole mounting. This allows flexibility in the selection of mounting options.
• Cost: GPS modules are available in different costs depending on functionality and features. It is advisable to select a module that meets the project requirements while remaining within the budgetary constraints.

How to DIY and Replace Low Power GPS Module

It is very important that the GPS module should be replaced as soon as possible when it stops working. The good news is that the replacement process is very easy and can be done by following the steps below:

1. Choose a new GPS module: Select a GPS module that matches the specifications of the old one or better suits the project's needs.

2. Power off: Turn off the device to avoid damage or data loss.

3. Open the device: Use appropriate tools to open the casing and access the internal components.

4. Disconnect the old module: Carefully disconnect the low-power GPS module from the device, noting the connections for reference.

5. Connect the new module: Connect the new GPS module, ensuring all connections are secure.

6. Close the device: Reseal the casing and power on the device to test the new module.

With these easy steps, the old GPS module will be replaced in no time. Remember to handle the internal components and connections carefully to avoid damage. If unsure about any step, consult the user manual or a professional technician.

Q&A

Q1: How does the GPS module get power?

A1: The GPS module gets power from the power supply connected to it. Once powered, it can provide location information based on the signals it receives from GPS satellites.

Q2: What is the role of the GPS module in a project?

A2: The GPS module allows the project to determine its geographical location and track its movement. This is useful for applications like navigation, tracking, and location-based services.

Q3: Why is the GPS module important in embedded systems?

A3: The GPS module is important in embedded systems because it provides accurate location and time information, which is essential for many applications like tracking, navigation, and timing synchronization.