1. Definition of Filter A filter is an electrical component used to reduce or eliminate interference by processing the input signal to obtain the desired signal. It effectively filters out frequency signals at specific frequency points or outside of those frequency points, thereby achieving the function of eliminating interference and obtaining a specific frequency signal. … Read more
NB-IoT and eMTC both belong to the cellular Internet of Things and share the “3C” characteristics of cellular IoT: •Coverage Enhanced Coverage •Consumption Low Power Consumption •Cost Low Cost To achieve the “3C” goals, NB-IoT and eMTC have different implementation methods, as follows: 1 Comparison of Key Technologies of NB-IoT and eMTC Enhanced Coverage The … Read more
If you still don’t understand NB-IoT after reading this article, come over and strangle me… 1 1G-2G-3G-4G-5G No explanation, just look at the picture. Where is NB-IoT? 2 NB-IoT Standardization Journey The standardization of 3GPP NB-IoT began in September 2015, and the R13 NB-IoT standard was completed in July 2016. 3 NB-IoT Design Goals and … Read more
Click the blue text to follow Optimizing ADC sampling accuracy is a key skill in microcontroller development, especially when processing sensor data. An inaccurate ADC sampling result can lead to system failures, such as significant errors in temperature sensors, causing devices to overheat or become too cold. Today, let’s discuss how to improve the accuracy … Read more
This article focuses on specific business aspects identified by QCI, such as base station-level QCI settings or cell-level QCI settings. This can lead to different QCI business switching parameter group IDs, DRX parameter group IDs, inter-system policy configuration group IDs, RLC PDCP parameter group IDs, logical channel priorities, etc. This article only introduces relevant commands; … Read more
Source: Network Optimization Mercenaries Published by IoT Think Tank Please indicate the source and origin when reprinting —— [Introduction] —— Although LTE and NB-IoT are of the same lineage, the design goal of LTE is high speed and large volume, while NB-IoT is born for the “intermittent transmission of small data” for the Internet of … Read more
NB-IoT, Niubility Internet of Things, refers to the powerful IoT technology. Regarding the Internet of Things, I would like to start with two interesting applications… This is not a restricted broadcast. This is the 3D fitness mirror launched by Nake Labs, which tracks your body shape changes through 3D scanning. This smart fitness mirror, named … Read more
The Ministry of Industry and Information Technology has issued a notice to promote the deployment of 1.5 million NB-IoT base stations. NB-IoT is surging forward. Many netizens have requested a comprehensive article on NB-IoT, so here comes a super detailed technical article. 1 NB-IoT’s Journey From 2G to 4G, mobile communication networks have been continuously … Read more
Typically, we categorize IoT devices into three types: ① No mobility, large data volume (uplink), requiring a wide frequency band, such as urban surveillance cameras. ② High mobility, requiring frequent switching, small data volume, such as fleet tracking management. ③ No mobility, small data volume, not sensitive to latency, such as smart metering. NB-IoT was … Read more
I believe the cross-platform abstraction provided by ZephyrRTOS is a very important feature. Of course, the abstraction itself also brings a more complex software architecture and a steeper learning curve. Recently, I tried to use the nRF52840 to create a low-power Bluetooth + LTE + GNSS board. Initially, the distributor lent me an nRF52840 DK, … Read more