phaten-audio/en/docs/dev_doc/faq/technical_faq/technical_faq.md

title, description, keywords

title	description	keywords
Common Questions and Answers for WiFi Audio + Bluetooth Modules	This document summarizes common technical questions and answers regarding wireless WiFi modules and Bluetooth modules, including IR remote decoding, power consumption, chip architecture, TX/RX switching, Bluetooth TWS, etc., to help developers quickly locate and solve problems.	8711, wireless speaker, IR remote, module power consumption, WIFI BT chip, TX RX switching, Bluetooth TWS, technical FAQ

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Technical FAQ for WiFi Audio + Bluetooth Modules

Q1: Does the module support IR remote decoding?

IR remote decoding is supported.

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Q2: Power consumption during module operation and standby

=== "Sleep Mode 1" - Operating state: Both TX/RX are in sleep, WiFi is off, TX and RX BLE are working - How to enter sleep: - The application actively calls the Sleep interface - Automatically enters after detecting no I2S data for a period of time - Wake-up method: - UART/GPIO interrupt wakes up TX → TX wakes up RX - UART/GPIO interrupt wakes up RX → RX wakes up TX (bi-directional wake-up) - Current: - Unidirectional wake-up: TX ≤1mA, RX ≤3mA - Bidirectional wake-up: TX ≤3mA, RX ≤3mA

=== "Sleep Mode 2" - Operating state: TX WiFi does not sleep, RX WiFi sleeps, TX/RX BLE are off - How to enter sleep: - The application actively calls the Sleep interface - Automatically enters after detecting no I2S data for a period of time - Wake-up method: - The application calls the playback interface (TX automatically wakes up RX) - RX is automatically woken up when I2S data is detected - Current: RX ≤1mA

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Q3: What is the WIFI and BT chip architecture of the module?

A single SoC integrates both WIFI and BT functions.

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Q4: Does it support online TX/RX switching?

Support status:

• Supports online TX/RX switching in WIFI mode
• BT mode limitations:
  • SoC only supports BLE5.0
  • Does not support Classic BT
  • Cannot transmit audio via mobile phone Bluetooth

Working mode description:

=== "TV Mode:" - The transmitter box is WIFI TX - The receiving speakers are dual RX (left/right channels)

 ![TV Mode](/assets/images/faq/wifiaudio_bl/FCM362K_problem_4-1en.png)

=== "BT Mode:" - Left speaker: * Receives mobile phone signal via BT * Simultaneously acts as WIFI TX to transmit to the right speaker - Right speaker: pure WIFI RX mode

 ![BT Mode](/assets/images/faq/wifiaudio_bl/FCM362K_problem_4-2en.png)

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Q5: Bluetooth TWS function implementation

• Native Bluetooth TWS is not supported
• Alternative solution:
  • In BT mode, the left speaker (with IR receiver) acts as TX
  • Transmits the right channel to the right speaker via TWS
  • The right speaker (without IR receiver) acts as RX to receive the TWS signal

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