I ordered two boards. Both accept code and the GPIO pins work fine. However, you cannot use WiFi. As others have pointed out, to use an external antenna you must replace the 0 ohm resistor. However, none of my boards work with the built-in antenna. If your application doesn't require Wi-Fi, these Wi-Fi cards are great.
πΆ Hawking HAI6SIP: Boost Your Wireless Signal Range with Hi-Gain 6dB Omni-Directional Antenna
9 Review
Asus RP-N12 N300 WLAN Repeater π 802.11 B/G/N - Boost Your Wireless Range!
10 Review
Gadgets World FBA_ALFA ARSN19M OMNI Directional High Gain
9 Review
πΆ Proxicast Ultra Low Profile MIMO 3G / 4G / LTE Omni-Directional Screw-Mount Antenna for Verizon, AT&T, Sprint (and Others) Modems & Routers with SMA External Antenna Ports
9 Review
π CERRXIAN RS232 to Ethernet Serial Device Server - TCP/IP Converter with 1Port DB9 RS232 Serial to Ethernet Connectivity
3 Review
π uni USB C Hub with Ethernet Adapter, 4K HDMI, Gigabit Ethernet, and 3 USB 3.0 Ports for MacBook Pro, iPad Pro, XPS
11 Review
HB-UMLS Sabrent USB 2.0 Hub with 4 Ports and LED Power Switches for Each Port
12 Review
π StarTech.com NETRS2321P: 1-Port RS232 to Ethernet IP Converter, Serial over IP Device Server - Black
5 Review