Speaker: HS 81 ?
MP3 Decoder:
VLSI VS10038
Sub-1GHz MCU:
TI CC1310
Wi-Fi: SB-WB-N08 ?
Temperature and RH sensor:
SHT30
pdf
New PM2.5 Sensor:
Honeywell HPMA115S0-XXX
CO2 Sensor:
Amphenol Telaire T6703-5K
SoC:
STM32F412 VGT6
Microphone: BSE F2
pdf
Antenas: Airgain N2420DG ,Airgain N915CS