Industrial grade GT-24 digital transmission wireless module 2.4G NRF24L01 PA LNA long distance 1100 meters
The product can be placed in two types of interfaces, such as chip type and pin solder type. Therefore, the pin is sent by default and is not soldered. Support for 51 STM8S STM32 arduino and other microcontroller development boards
The GT-24 module is an integrated data transmission module for 2.4GHz, 100mW, high speed (up to 2Mbps airspeed), high stability, industrial grade wireless transceiver. The module is equipped with a high performance PCB antenna, precision impedance matching and nRF24L01P RF chip, which has higher reliability, higher power level, longer transmission distance and lower power consumption than nRF24L01. In addition, the built-in RFX2401 power amplifier chip has a built-in LNA with a receiving sensitivity of 10dBm and operates in the 2.4GHz to 2.5GHz ISM band. The module has sufficient transmit power, good spectral characteristics, small harmonics, small channel crosstalk and ultra-small size.
Industry standard model. It has a 2.54mm standard in-line interface and a 1.27mm patch interface for easy access to a variety of circuits. In addition, the GT-24 module is equipped with a built-in PCB antenna and an ipx external antenna, which greatly enhances the module’s free characteristics.
Driving method introduction:
-The module is nRF24L01P PA LNA and its driving method is exactly the same as nRF24L01P. Users can operate according to the nRF24L01P chip manual.
-The CE pin is connected to the LNA enable pin. When CE = 1, the LNA is turned on. When CE = 0, the LNA is turned off. This operation is identical to the transmit and receive modes of the nRF24L01. In other words, the user does not have to care about the LNA operation at all.
-The CE can be connected high for a long time, but the module must be set to the POWER DOWN shutdown mode when writing to the register. It is recommended to connect the CE to the IO port of the MCU.
-The IRQ can be disconnected and the SPI Query mode can be used to obtain the interrupt status. However, it is recommended to use an external interrupt from the microcontroller.
-The module’s CE pin timing operation can be as high as 10us mentioned in the nRF24L01P technical manual, but we recommend changing it to: SPI operates high CE until the transmission interrupt is completed, then maintains 1mS high and then lowers CE. The purpose of this is to switch to receive mode immediately after sending the GT-24. If CE = 0, the LNA is turned off, which will adversely affect the receiving sensitivity.
-Note that the grounding is good, the laying area is large, and the power supply ripple is small. Filter capacitors should be added as close as possible to the VCC and GND pins of the module.
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