I want to share with you my tutorial which allows to post datas on the Ubidots Cloud provider (https://ubidots.com/)
The tutorial uses a NucleoL476RG board and X-Nucleo-IDW01M1 wifi shield.
The MBed code allows wifi connection with a local Access Point, then makes an HTTP socket connection with the Ubidots web site API. Finally, the STM32L476 performs some internal ADC conversions (VBAT and Temp sensor channels). Also, store the state of the USER_BUTTON and send them using an HTTP POST and the Rest API command methods.