Q1: What is a full duplex?
December 14, 2019
A1: Full duplex refers to sending and receiving separately so that data is transmitted in both directions simultaneously. You can send data and receive data at the same time, both at the same time.
Q2: What is LoRa spread spectrum technology?
September 24, 2019
A2: LoRa is a new low-power data transmission technology over long distances based on less than 1 GHz developed by Semtech. This technology USES special spread spectrum modulation technology to greatly improve the performance of physical layer communication, and its power-saving capacity has been significantly improved compared with GSM and traditional sub-1 GHz technology. LoRa USES a special spread spectrum technology that allows terminals of different spread spectrum sequences to send simultaneously at the same frequency without interfering with each other. The concentrator/gateway developed on this basis can receive and process data from multiple nodes in parallel, greatly expanding the system's capacity. The range and location capability based on this technology will promote its large-scale application in the field of the Internet of Things.
Q3: The difference between CC3220 and CC3200
July 09, 2018
A3: CC3220 is the upgraded version of CC3200, which can support the connection of up to 4 stations in AP mode. Meanwhile, it has added IPV6 support, enhanced the design of wifi RF, greatly improved the configuration success rate of SmartConfig, and supported the Security function to protect the Security of built-in CODE from being damaged.
There are three CC3220 chips, namely CC3220SF, CC3220S and CC3220R.
CC3220SF is built with 1MB Flash, and the client's code runs directly in Flash. The 256k RAM is fully open to the client, and Security is also added.
CC3220S USES 256k of RAM to run code and RAM at the same time, that is, the RAM used by code + program is within the range of 256k, which increases the support for Security.
The CC3220R has a built-in 256k of RAM.
Q4: BQB certified module with shielding hood or not to the performance of the module, how to explain the consistency of stability?
August 28, 2018
A4: Adding shielding can shield the interference of external signals to the module's circuit, and can also prevent the interference of the module's circuit to rf.
Q5: The product USES the BQB authentication module. Do you need other Bluetooth authentication?
August 28, 2014
A5: It just needs to pass the other certification of the product, such as FCC, CE, and Bluetooth parts without passing the certification.
Q6: What is the interference resistance of the BLE module? How about your ability to walk through walls?
August 28, 2014
A6: Using FM communication, 37 communication frequency points, and 3 broadcast frequency points. It can effectively avoid some frequency interference. It is not recommended to use it through the wall, if it is a hollow wooden wall can try it.