I want to update my ESP32 (M5Stack Dial) host firmware, but I do not have access to any of the pins. How do I use the manual update (Updating Host Firmware - IoT Connectivity at Blues) without any pins? I have it all working except it fails because the NoteCarrier is not wired to my ESP32. I don’t understand why the direct wiring is even needed using this method. I am pulling the firmware update into the OTA partition and then it reboots. Wiring is not required to do this because I do this from my own Azure Storage account before I used BlueNote Cards.
Hi @chuckgiddens, welcome to the Blues forums!
How are you currently communicating with your Notecard from the ESP32? Can you please share how you have the M5Stack Dial and the Notecard connected?
To use the Notecard’s ODFU functionality, you’ll need to be able to access the ESP32’s IO0, EN, RXD0 & TXD0 GPIO pins. Currently this is the only way to perform ODFU, by using the Notecard’s AUX pins. This is different from using the ESP32’s own OTA mechanism (what you may be using with Azure Storage) as the Notecard’s ODFU treats the ESP32 as a standalone host, e.g. like you are flashing it from a personal computer and therefore need access to the bootloader/bootstrapping pins.
From looking at the M5Stack Dial’s schematic, these are enclosed within the ESP32 Stamp element of the Dial’s case. I’m not sure this will be possible without an intermediate board to expose the previously mentioned GPIO pins.
Hopefully we can help you find a solution for this,
Alex
Aducknall,
Regards
Rob