The Bolt IoT platform is a tool which lets you connect your projects and things (Hence the term Io'T') to the internet.
To enable a user to do just that in a hassle free manner, we have written a firmware which allows the user to make different IoT projects without requiring to change the firmware of the product.
While it is possible to change the firmware (It is a device based on the esp8266), to ensure that one customer's experiments don't interfere with the working of the Cloud (and consequently degrade the experience of other customers), we do not allow customers to change the firmware on the Bolt WiFi module.
You can, however, use a separate device (Such as the nodemcu or a generic esp8266) to carry out the network tests and relay the result to the Bolt Cloud using, by relaying the results to the Bolt WiFi device via UART.
Read up on Interfacing Controllers to lear more about the same.