Help needed for Zigbee custom partition scheme for ESP32 C6 Qwiic Pocket

Development Boards ESP32
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I’ve developed a sketch that sends distance data (derived from a VL53L1X Time-of-Flight sensor) from a 4MB ESP32 C6 Qwiic Pocket (EQP) to a Hubitat hub. With a little effort (i.e., using the Double Luck Voodoo pairing process well-known to Hubitat users), the EQP pairs fine. I’ve posted my sketch and an accompanying Hubitat driver in the Hubitat community forum.

Compiled, my sketch uses 54% of the program storage space; maximum is 1,310,720 bytes. I used the partition scheme “Zigbee ZCZR 4MB with spiffs”.

I tried adding WiFi and OTA capability, but the libraries needed for that functionality put my sketch at 109% of the available program storage space.

I tried a LOT (with the help of Claude AI) to craft a custom partition scheme that provided more program space while staying within 4MB and enabling both OTA and Zigbee, but no variant would work. Below is the last version I tried, which sent the EQP into an endless boot loop.

# Name,     Type, SubType, Offset,  Size,     Flags
nvs,        data, nvs,     0x9000,  0x6000,
phy_init,   data, phy,     0xf000,  0x1000,
otadata,    data, ota,     0x10000, 0x2000,
app0,       app,  ota_0,   0x20000, 0x1A0000,
app1,       app,  ota_1,   0x1C0000,0x1A0000,
zb_storage, data, fat,     0x360000,0x4000,
zb_fct,     data, fat,     0x364000,0x1000,
zb_nvram,   data, fat,     0x365000,0x4000,
spiffs,     data, spiffs,  0x369000,0x97000,

Has anyone crafted a working custom partition scheme that provides more program space while staying within 4MB and enabling both OTA and Zigbee?

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I find claude.ai to be generally pretty good at these kinds of things, it had a few seemingly helpful suggestions over here that might help get it goin’ (the first 2 sound very viable to me!)

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LOL! That was ME, querying Claude to solve this problem. None of that worked (and Claude and I went back and forth for a couple of hours to trying different things). So that’s why I posted my query here, in case someone had more experience (and good luck!) than Claude.

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It might help to post in the espressif forum for the C6 or maybe also on stackoverflow…but hopefully someone here has some experience and can show us the light

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