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I am trying to build a slim Bluetooth speaker but I am very new to electronics. I got as far soldering a TinySine AudioB I2S V4 Bluetooth Digital Audio Receiver Module - I2S slave and two MAX98357 I2S 3W Class D Amplifier DAC Decoder Breakout Boards with wires to pins. It properly connects to my iPhone, but when I start streaming audio to it, it stays dead silent for exactly ten seconds, then disconnects completely. It never plays any audio cues whatsoever like "connected" or "paired", but I don't think the speakers are failing because I tapped them with wires off of a battery and they consistently crackled.
I currently have the voltage inputs and GNDs wired directly to my 3.7V 2600mAh battery with a connecter in between, I have the LRCK pin on the AudioB wired to the LRC on the amplifiers, BCK to BCLK, and the SD on the AudioB to the DIN on the amplifiers.
I started my problem solving by blankly staring at the speaker for a few minutes hoping it would magically start working, then checking the pins with a multimeter to make sure they were connected adequately, which they were.
Being my first time working with electronics, I have been trying to figure it out by reading forums, watching videos, asking AI, etc. At first I thought that it might've needed an antenna so I bought a Small 2.4GHz Antenna off amazon which didn't change any symptoms. Then I found out the both chips being "Slaves" means they need an external master clock so I purchased a Seeed Studio XIAO ESP32 C3 hoping I supply the master clock signals with that. I was reading mixed signals from the TinySine website, their customer support, and AI on whether the AudioB produced its own clock signals and ultimately couldn't figure it out. Last night, I thought that maybe connecting SD to DIN was wrong. Although I'm sure the answer is obvious to most people with more experience, I feel like I've fallen down a rabbit hole and can't tell right from left. Any advice is appreciated
Here are links to the boards: AudioB - https://www.tinyosshop.com/audiob-i...ter_description=true&filter_sub_category=true
MAX amp - https://www.amazon.com/MAX98357-Amplifier-MAX98357A-Interface-Filterless/dp/B0FHWB5VFW/ref=sr_1_7?crid=1OBM8AUJ1HT5Z&dib=eyJ2IjoiMSJ9.LeynNytsDfJOPmhGPbmeARgUKnzipK2k7KUbo8OdTAPXae7b41ZR0WD-5HadjNvimic3jLHMUVROmssnbQNTpKMTATMgu-lAeWhSgAJ98xq-vxToXVUuqKRdcNDarVXlhDZvqCRmaL7b51vTHrG_R8Holb0JKSUXMwrsnruPYVIimwFcWmbWBSWFog4ljH8s8c7Epg82QUYutaDZ2xxqH4CvW8HzKtvqVEQGwZcFJOY.wqkOSb8eBibRG-B7mW8JvDdPo5Y6VArvGEFmmXM6e0g&dib_tag=se&keywords=Stereo+I2S+amplifier+class+d&qid=1782871845&sprefix=stereo+i2s+amplifier+class+d%2Caps%2C78&sr=8-7
I currently have the voltage inputs and GNDs wired directly to my 3.7V 2600mAh battery with a connecter in between, I have the LRCK pin on the AudioB wired to the LRC on the amplifiers, BCK to BCLK, and the SD on the AudioB to the DIN on the amplifiers.
I started my problem solving by blankly staring at the speaker for a few minutes hoping it would magically start working, then checking the pins with a multimeter to make sure they were connected adequately, which they were.
Being my first time working with electronics, I have been trying to figure it out by reading forums, watching videos, asking AI, etc. At first I thought that it might've needed an antenna so I bought a Small 2.4GHz Antenna off amazon which didn't change any symptoms. Then I found out the both chips being "Slaves" means they need an external master clock so I purchased a Seeed Studio XIAO ESP32 C3 hoping I supply the master clock signals with that. I was reading mixed signals from the TinySine website, their customer support, and AI on whether the AudioB produced its own clock signals and ultimately couldn't figure it out. Last night, I thought that maybe connecting SD to DIN was wrong. Although I'm sure the answer is obvious to most people with more experience, I feel like I've fallen down a rabbit hole and can't tell right from left. Any advice is appreciated
Here are links to the boards: AudioB - https://www.tinyosshop.com/audiob-i...ter_description=true&filter_sub_category=true
MAX amp - https://www.amazon.com/MAX98357-Amplifier-MAX98357A-Interface-Filterless/dp/B0FHWB5VFW/ref=sr_1_7?crid=1OBM8AUJ1HT5Z&dib=eyJ2IjoiMSJ9.LeynNytsDfJOPmhGPbmeARgUKnzipK2k7KUbo8OdTAPXae7b41ZR0WD-5HadjNvimic3jLHMUVROmssnbQNTpKMTATMgu-lAeWhSgAJ98xq-vxToXVUuqKRdcNDarVXlhDZvqCRmaL7b51vTHrG_R8Holb0JKSUXMwrsnruPYVIimwFcWmbWBSWFog4ljH8s8c7Epg82QUYutaDZ2xxqH4CvW8HzKtvqVEQGwZcFJOY.wqkOSb8eBibRG-B7mW8JvDdPo5Y6VArvGEFmmXM6e0g&dib_tag=se&keywords=Stereo+I2S+amplifier+class+d&qid=1782871845&sprefix=stereo+i2s+amplifier+class+d%2Caps%2C78&sr=8-7
