1. Chip
For a Bluetooth module, the chip occupies its main position. The chip determines the computing power of the Bluetooth module. Without a strong "core", the performance of the Bluetooth module cannot be guaranteed. If you choose a Bluetooth Low Energy module, the better chips include Nordic, Ti, Dialog, etc. At present, BLM World uses the Dialog DA14531 chip for Bluetooth LE module BLM-MOD02. This BLE5.1 chip supports ultra-low power consumption.
2. Power Consumption
Bluetooth is divided into traditional Bluetooth and Bluetooth LE. Smart devices that use traditional Bluetooth modules are frequently disconnected and need to be paired frequently, and the battery will run out quickly, while smart devices that use Bluetooth Low Energy modules only need one A coin cell battery can run for a long time. Therefore, if it is a battery-powered wireless smart device, it is best to use Bluetooth 5.1/5.0/4.2/4.0 low energy Bluetooth module to ensure the product's battery life.
3. Transmission Distance
Users need to know what environment their products are used in, how long wireless transmission distance for their requirements, and whether there are strong interferences, etc. For wireless products such as wireless keyboards, POS machines, and remote controls that do not require high wireless transmission distance, you can choose a BLE module with a transmission distance of more than 10 meters, such as the Bluetooth LE module BLM-MOD02; products with high wireless transmission distance requirements, you can choose a transmission distance of more than 50 meters, such as the BLM-BT01B Bluetooth module.
4. Interface
According the requirements of the specific functions for the interface, the Bluetooth LE interfaces are divided into serial interfaces, USB interfaces, digital IO ports, and SPI programming ports, each of which can implement different corresponding functions. If it is only data transmission, a serial interface is fine.
5. Antenna
Different products have different requirements for antennas. At present, the commonly used antennas for Bluetooth modules include PCB antennas, ceramic antennas and IPEX external antennas. If they are placed inside a metal bunker, the Bluetooth module with an IPEX external antenna is generally selected. BLM World now has BLE modules that support external antennas, as well as LE modules with ceramic antennas.
6. Cost Performance
The Bluetooth standard supports Bluetooth Low Energy BLE from version 4.0. Bluetooth Low Energy is also developed on the basis of traditional Bluetooth, and is different from traditional modules. The biggest feature is that the cost and power consumption are reduced, and it is suitable for small data rates. , In the application of discrete data transmission, when the distance and power consumption can meet the requirements, the cost should be the most concerned issue for users. BLM World technology has been in the field of wireless modules for many years, and there is a low-cost and extremely low Bluetooth. Module — BLM-BT01B Bluetooth transparent transmission module, low power consumption, low cost.