▲Author: Yan Guiling Introduction: Today’s experiment mainly involves developing a small function based on STM32 that can obtain weather and time in real-time. This function can be applied to devices that need to display weather and time, and the hardware cost is very low. If anyone is interested, feel free to check it out! 1. … Read more
The ESP8266 is an ultra-low-power UART-WiFi transparent transmission module, featuring highly competitive packaging size and ultra-low energy consumption technology. It is designed specifically for mobile devices and Internet of Things applications, allowing users’ physical devices to connect to Wi-Fi wireless networks for internet or local area network communication, thus achieving networking functionality. Although the “WiFi … Read more
Source: LPWAN Technology IoT Think Tank Organized and Published Please indicate the source when reprinting —— [Introduction] —— The author’s remarks: The following narrative is solely personal opinion, devoid of any emotional color. Background The core development technologies of NB-IoT are held by a few major companies, such as Huawei HiSilicon, Qualcomm, and Intel. Of … Read more
Introduction: The AT device package for controlling wireless modems is one of the most popular extensions for RTOS. This article has 6145 words, reading time approximately: 7 minutes The AT device package for controlling wireless modems is one of the most popular extensions for RTOS. RTOS is an open-source embedded operating system, developed by RT-Thread. … Read more
Check out this tutorial to see how easy it is to set up hardware flows using Node-RED’s drag-and-drop interface. — Surya G Check out this tutorial to see how easy it is to set up hardware flows using Node-RED’s drag-and-drop interface. Node-RED is a programming tool that allows you to quickly connect hardware devices using … Read more
vcgencmd tool is used to output information from the VideoCore GPU on Raspberry Pi. You can find the source code for the vcgencmd utility at Github.To get a list of all supported vcgencmd commands, use vcgencmd commands. Below are some useful commands and their required parameters. vcos The vcos command has two useful subcommands: version … Read more
View the wireless clients connected to the OpenWrt router: 1 2 iwinfo wlan0 assoclist iw dev wlan0 station dump View the assigned DHCP client IP: 1 cat /tmp/dhcp.leases Scan for wireless routers/AP: 1 iwinfo wlan0 scan View OpenWrt router wireless information: 1 2 3 4 5 6 7 8 9 10 11 12 13 iwinfo … Read more
View connected wireless clients to the OpenWrt router: 12 iwinfo wlan0 assoclistiw dev wlan0 station dump View allocated DHCP client IPs: 1 cat /tmp/dhcp.leases Scan wireless routers/APs: 1 iwinfo wlan0 scan View wireless information of the OpenWrt router: 12345678910111213 iwinfo wlan0 infowlan0 ESSID: "OpenWrt" Access Point: 00:1F:A3:65:55:8E Mode: Master Channel: 5 (2.432 GHz) Tx-Power: 20 … Read more
1、reboot means to restart. 2、source makes the modified files take effect immediately, avoiding the problem of having to restart for the changes to take effect. For example, if we modify /etc/profile, the changes will not take effect immediately. In this case, we can enter source /etc/profile to apply the changes. There will be more updates … Read more
3.3.1 Bluetooth Command Settings Knowledge The embedded Bluetooth serial communication module allows us to break free from the constraints of cables and achieve wireless serial communication within a limited range, with two working modes: command response mode and automatic connection mode. In automatic connection mode, the module can be divided into three roles: Master, Slave, … Read more