To update the firmware you should choose the right typer of board. If not is not on the list, please check that it is properly configured in the Tools menu. Your board should be in the list of the available serial ports. Open the Tools menu and select the Firmware Updater. Once done, open the plug-in that is available in the Tools menu. Upload the sketch and keep the board (either the one with the shield plugged in, or the MKR1000 itself) connected to the computer. The 'FirmwareUpdater' sketch is available in Examples -> WiFi101 To simplify the process, we have prepared a specific sketch: this FirmwareUpdater that you must load on the host board (either the one with the shield plugged in, or the MKR1000 itself) and an easy to use plug-in available in Arduino Software (IDE) 1.6.10 onwards. Unfortunately, the WiFi shield 101 uses model A, which Atmel has stopped supporting, so there is no 19.6.1 firmware release for it, 19.4.4 will be the latest firmware version that is compatible. Important note: The 19.6.1 firmware is only available for model B of the WINC1500, this is used in the MKR1000 board. The board should be connected to the USB port of the computer ready with Arduino IDE.

MKR1000 WiFi or WiFi Shield 101 connected to an Arduino board.How to update the firmware and loading certificates on the MKR1000 WiFi and WiFi Shield 101.If the Check WiFi101 Firmware Version tells you that you may have issues because the firmware and library versions do not match, here is the solution to align them. This tutorial will guide you in the process of updating the firmware or loading certificates on your MKR1000 WiFi board or WiFi Shield 101.

Zinwell firmware update