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.
Gadgets World FBA_ALFA ARSN19M OMNI Directional High Gain
9 Review
Boost Mobile Signal with 4G LTE Antenna TS9 - Dual πΆ Mimo WiFi Amplifier for Huawei Hotspot - Long Range High Gain Antenna
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
πΆ Hawking HAI6SIP: Boost Your Wireless Signal Range with Hi-Gain 6dB Omni-Directional Antenna
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
π Juiced Systems Silver BizHUB USB-C Multiport Gigabit HDMI Hub with 3 USB 3.0 Ports, Gigabit Ethernet, 4K HDMI, SD/Micro SD, and USB-C Power Delivery
11 Review
UGREEN USB 3.0 Ethernet Adapter Hub with RJ45: Fast Gigabit Ethernet Converter, 3 Ports USB 3.0 Hub Compatible for MacBook, iMac, Surface Pro, Chromebook, Laptop, PC
11 Review