ESP8266 serial WiFi expansion board is a low-power UART-WiFi module based on Lexin ESP8266 developed by Shenzhen Sibo Zhilian Technology Co., Ltd. It is compatible with Arduino UNO, Mega and other standard motherboards, which can be easily developed and accelerated. Product prototype design. Based on the Lexin ESP8266 module, the serial port to WiFi function is realized. The module has the following features: 1. WiFi adopts industrial grade chip ESP8266, and the module is ESP-12E with metal shield, strong anti-interference ability; 2. The standard pin is compatible with the main control board such as Arduino Uno and Mega2560. The Arduino and UNO are connected by a voltage conversion chip, which makes 3.3V and 5V compatible; 3. The serial port is controlled by a dual-way DIP switch, so that the expansion board can be used as an Arduino Uno expansion board alone or as an ESP8266 expansion board. 4, true serial WiFi, Arduino program does not require any configuration; 5. Configure WiFi parameters and serial port parameters based on WebServer; 6, can be used as an independent ESP8266 development board, download the official AT command firmware, NodeMCU open source firmware, etc.; 7, can be used as a stand-alone Arduino Uno expansion board, all the leads are taken out. Pin connection: GND: Ground GPIO16: Actually it is RST, low level reset, so in order to work normally, you can directly connect to VCC. VCC: Connected to 3.3V, I have seen other tutorials that can't connect to 5V, but Xiaobian has tried to play with 5V directly. After playing for a while, there is no problem, it can be used normally. But there is a problem that the chip is very hot, so it may burn out the module after a long time, and the wifi module will overheat and the connection will be slow. So try to use 3.3V. UTXD, URXD: The former is connected to the RXD of the single-chip microcomputer or USB to serial port module, and the latter is connected to the TXD. These two can be connected with the RXD and TXD of the 5V MCU. After the test communication is normal, no 5V to 3, 3V is needed. GPIO2, GPIO0: floating CH_PD: Look at some tutorials that can be directly connected to VCC, but after testing, the current is too large, so it is necessary to connect to VCC via a resistor, that is, connect a resistor in series and then connect the resistor to VCC. The resistance of the resistor: k. Xiaobian uses 4.7k, in fact, this is not strictly restricted.
A new rule from the Drug Enforcement Administration (DEA) threatens to upend the American hemp industry, and could even result in criminal prosecutions for manufacturers of CBD and delta-8 THC products.
The DEA says the [interim final rule," issued Aug. 20, is simply a matter of adjusting its own regulations to account for changes to the Controlled Substances Act that were mandated by the 2018 Farm Bill (or Agricultural Improvement Act) that legalized hemp and CBD production. The new rule [merely conforms DEA`s regulations to the statutory amendments to the CSA that have already taken effect," says the agency. The new rule doesn`t break any ground, according to the DEA.
But many experts on cannabis and hemp law say the DEA rule creates a potential pathway the law enforcement agency could use to prosecute hemp processors and producers of CBD (cannabidiol) and delta-8 THC (or Δ8THC) products. There are two issues: partially processed CBD, and [synthetically derived" delta-8 THC.
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Esp8266 serial wifi instance
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