Kingdom-tech is one of the most professional suppliers for worldwide customers. We provide branded LTE modules,WCDMA modules,GSM modules,GNSS modules,NB-IoT modules and Wifi modules. We offer fast delivery, high quality, and we are very cooperative and friendly.
EC20 supports multiple-input multiple-output (MIMO) technology, a cutting edge antenna technology capable of transmitting multiple data streams on multiple transmitters to multiple receivers. The antennas at each end of the communications circuit are combined to minimize errors and optimize data speed. The module also combines high-speed wireless connectivity with embedded multi-constellation high-sensitivity GPS+GLONASS receiver for positioning.
● Worldwide LTE, UMTS/HSPA+ and GSM/GPRS/EDGE coverage
● Compact SMT form factor ideal for small end products with tight space and extended operating temperature range
B1/ B3/ B8
B38/ B39/ B40/ B41
CCC/ SRRC/ NAL
Q.1. What's your advantages?
Q.2.How to deal with the UART communication failure?
First of all, check the level of STATUS pin to judge whether the module is powered on or not. High level means the module is on and low level means the module is off. If module has already been powered on, you need to analyze it according to the following two situations.
2.1 Abnormal Communication between PC and EVB
1) Check whether the serial cable is OK or not. It is recommended to use the Quectel serial cable, which can avoid the abnormal communication between PC and EVB when using three-wire serial cable under the hardware flow control.
2) Check the usage of the serial tool is right or wrong. If you use QCOM tool provided by Quectel, please tick RTS as the following figure.
2.2 Abnormal Communication between MCU and module
1) Please check whether the baud rate of MCU is corresponding with the module’s or not. Quectel module is set as autobauding by default. Send 2~4 AT Commands to synchronize the baud rate of the module. Some modules might need more AT commands to get synchronized. Once the module gets synchronized, it is suggested to use AT+IPR command to fix the baud rate and use AT&W to save it.
2) If using three wires to connect MCU and the module, it is needed to check if the hardware control is closed.
Q.3.How is seller service?
If you do not receive the commodity within 60 days, you can ask for a full refund before order completion .
Q.4.How is return policy?
If the product you received is not as described or low quality, we promises that you can return it before order completion and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and ask for the negotiable refund from the seller.
Packing and Delivery: