Support data recording on Agave RevB

[nitin710]

Description

• Recording is tested working on EmotiBit V5 + feather ESP32 V2 + Adafruit SPI Flash SD Card.
  • esp32 v2 test branch
• But a record begin command fails to start recording on the Agave RevB board.
• Needs further investigations. Some clues:
  • We are able to talk to the flash chip since we are able to successfully store the wifi creds on the SD-Card
  • We are able to read the creds from SD card on every boot cycle.
  • This code has only been tested on a single board, so a HW issue is not completely ruled out.
• Note that the code changes do not revolve around the SD- library which is used to interface with the SD-Card, so it is curious that the Record begin is not working with this board.

[nitin710]

Found the bug. It was not an SD issue. It was actually a null pointer exception in printConfigInfo function.

the emotibitEda.writeInfoJson function https://github.com/EmotiBit/EmotiBit_FeatherWing/blob/a63cba341eff8a3320da21e9ee9a9d9ff34b779e/EmotiBit.cpp#L2671 has a null pointer, that is only allocated after emotibitEda.setup is called. But for Agave board, we skip setup. Therefore, that leaves a nullpointer in the emotibitEda class. https://github.com/EmotiBit/EmotiBit_FeatherWing/blob/a63cba341eff8a3320da21e9ee9a9d9ff34b779e/EmotiBitEda.cpp#L548

That was being called in printConfigInfo.

Suggested fix

• In EmotiBitEda
  • We add nullpointer handling
  • We add a check to make sure setup was called.
• In EmotiBit.cpp
  • use acquireData.typetag to check is contents should be added to info file