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Expanding ESP32-S3 capabilities with RS41 Radiosonde integration utilizing UART communications. One proof of concept <code>TEST</code> prototype has been constructed using point to soldered connections. The current <code>BETA</code> is being constructed using a modified 10 conductor 1mm spaced flat ribbon cable and 2x5 2mm IDC connector. This makes for a "plug-able" adapter between the sonde and main PCB. The position and connections utilized are an interim test of developing a custom M.2 Key E form factor adapter.
 
[[File:Whirlybird RS41 BETA Plugable Connector.jpeg|800px]]
 
<code>BETA</code> pictured above and first demo'd at Mountain View Reverse Engineering October 2024. Note that the sparkle infused hot glue on the M.2 connector does not actually attache the RS41 Radiosonde. Only the connector is secured to the Whirlbird PCB in lue of a M.2 adapter board and allows the sonde to be hot swapped without any modifications, soldering or other connections.
<code>TEST</code> utilizes the regulated 3v3 power directly to the sondes MCU and a GPIO expander port that enables a sink to ground for reset. <code>BETA</code> is experimenting with supplying 4v7 to the battery connection so the sonde can power itself from integrated voltage regulators.
Whirlybird RS41 ALPHA M.2 Prototype Wiring.jpeg
RS41 Radiosonde IDC 10 Conductor Ribbon Cable Attachment.jpeg
Whirlybird RS41 BETA Plugable Connector.jpeg
Whirlybird RS41 BETA TEST ALPHA.jpeg
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