The Wi-Fi module, also known as the serial port Wi-Fi module, belongs to the transmission layer of the Internet of Things. Its function is to convert the serial port or TTL level into an embedded module that conforms to the Wi-Fi wireless network communication standard. The built-in wireless network protocol IEEE802.11b.gn Protocol stack and TCP/IP protocol stack. Traditional hardware devices embedded in Wi-Fi modules can directly use Wi-Fi to connect to the Internet, which is an important part of realizing wireless smart home, M2M and other Internet of Things applications. The product needs to apply for the SRRC certification established by China for radio because of its wireless transmission function.

RoHS is the abbreviation of \"The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment\". It is the European Union\'s regulation on electronic and electrical products and related chemical substances.

The \"Radio Law\" requires the type approval of designated radio equipment (that is, the certification of compliance with technical regulations). TELEC certification is mandatory, and the certification body is a registered certification body recognized by MIC in the scope of designated radio equipment. TELEC (Telecom Engineering Center) is the main registered certification body for conformity certification of radio equipment in Japan.

Chinese electronic products are exported to the world. CE certification is required for export to EU countries. CE certification is a mandatory certification, just like China’s CCC certification. CE certification is a stepping stone for entering the EU market. Many manufacturers may not have CE certification. I understand, the detailed operation of CE certification is introduced below.

The RED Directive (The Radio Equipment Directive, RED) is a radio equipment directive under the framework of the European Union’s new method directive. Its full name is \"The European Parliament and the Council of the European Union Directive 2014/53/EU on April 16, 2014-Coordinating Member States Directive 1999/5/EC on the listing and abolition of radio equipment\". The RED Directive establishes a regulatory framework for radio equipment to be put on the market and put into use in the European Union. Before wireless products can be legally sold in EU countries, they must be tested and approved according to the RED directive, and they must also have the CE-mark. Wireless remote control products must comply with the RED directive RED 2014/53/EU requirements.

The Wi-Fi module, also known as the serial port Wi-Fi module, belongs to the transmission layer of the Internet of Things. Its function is to convert the serial port or TTL level into an embedded module that conforms to the Wi-Fi wireless network communication standard. The built-in wireless network protocol IEEE802.11b. Protocol stack and TCP/IP protocol stack. Nowadays, the wireless network is very developed, and there are wireless networks everywhere, and the export of this WiFi module to the EU area also needs to apply for CE-RED certification.

FCC-ID is one of the compulsory FCC certification models in the United States, which is suitable for wireless products with high technical difficulties. Products with wireless transmission frequencies, such as Bluetooth devices, WiFi devices, wireless alarm devices, radio receiving and transmitting devices, phones, computers, etc., need to apply for FCC-ID certification. The certification of wireless products is directly approved by the FCC TCB agency, and the certification certificate can be checked on the official website of the FCC in the United States. The time period is 3-4 weeks and no factory inspection is required. If the product standard remains unchanged, it is always valid.

Wireless routers are very common household electronic products. Family mobile phones, computers, tablets and other Internet access require routers to connect to the Internet. A qualified router must not only meet the performance standards, but also in terms of information security, electrical safety, electromagnetic compatibility, and radio frequency. It is also necessary to meet the basic requirements of EU CE certification, which is the basic requirement for routers to enter the EU market.