Goodmorning, i’d like to know if seeed’s firmware for xiao esp32c3 ,with built in an ESP32C3FN4, are flashable also in an ESP32C3FH4 and if they work in the same way. Thank you in advance for the support.
Hi there Antonio_Campisi,
ESP32-C3FN4;
RF System on a Chip - SoC SMD IC ESP32-C3FN4,
single-core MCU, 2.4G Wi-Fi & BLE 5.0 combo,
QFN 32-pin, 5*5 mm, 4 MB flash inside, -40C +85C
Lifecycle:
End of Life: Scheduled for obsolescence and will be discontinued by the manufacturer.
ESP32-C3FH4 (currently in stock and being sold today)
RF System on a Chip - SoC SMD IC ESP32-C3FH4,
single-core MCU, 2.4G Wi-Fi & BLE 5.0 combo,
QFN 32-pin, 5*5 mm, 4 MB flash inside, -40C +105C
Same chips , Older die, being fazed out and Newer power efficient silicon, Higher Temps in it’s place. It is manufactured by TSMC using their 40 nm process.
ANSWER:: YES they are Identical in form and function.
HTH
GL 
PJ
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thank you vary much man, even if seeed studios has told me that the firmware are different i will make a try 