[size=4][b]What is fast charging of batteries? [/b][/size] [size=4] First of all, we need to understand the charging and discharging principle of lithium-ion batteries. Batteries have two poles: the p...
Many IoT applications now generally use LoRa chips, but not LoRaWan network protocols. After investigation, it was found that the reasons for not using the LoRaWAN network protocol are: small number o...
A few days ago, I saw a lot of things similar to WeChat group plug-ins. One person sells for 199 per year, and the sales volume is several thousand, 100,000 per year. I think this thing is quite amazi...