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
If you don’t want to miss my updates, remember to check the public account in the upper right corner and set it as a star, and take down a star for me. This analysis question still comes from Huawei’s hardware position written test questions. This time we analyze three multiple-choice questions, involving knowledge points: UART … Read more
Some say the path to 5G evolution is as complex as a maze. Unlike in the past, there are up to 8 options for 5G networking architecture. Apart from Option 1, which is the 4G architecture, and Options 6 and 8, which have been abandoned by the industry, there are still Options 2, 3, 4, … Read more
Two months ago, I had already flashed the root version of the official firmware for the Phicomm K3 router (see “Flashing ROOT Firmware on Phicomm K3 Router: Enable Ad Filtering, Internal Network Penetration, and Aria2 Features”), but during use, I found that it occasionally lost connection, and the ad filtering effect was not ideal, especially … Read more