DFM-17 Radiosonde: Difference between revisions

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*Error Correction: Code-spreading, interleaving

*SoC: STM32F100R8T6B, 24MHz, 8KB RAM, 64KB Flash

*GPS: ~~Ublox~~ MAX-M8C-0-10

*GPS: U-Blox MAX-M8C-0-10

*Transmitter: Si4063

=== Peripheral attachment points ===

* U-Blox GPS is attached to USART_2 on the STM32 via pins PA2 and PA3

* External serial port (USB connector) is attached to USART_1 (PA9 and PA10), sharing TX/RX with the external I²C bus.

<br />

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File:DFM-17 NOAA Label.jpg|The label sticker NOAA(US) puts on the back of their DFM-17 radiosondes

File:Dfm17-2layers.png|A view of the DFM-17 Radiosonde showing both layers to better assist tracing connections while reverse engineering the hardware.

File:Label id speculaton.jpg|Possible meanings of the internal labels and values. The date code in particular which may be useful to date production times. NWS sondes have the same cryptic string printed on the outside of the sonde where the mfg. date normally is on other countries'. "TU" may just indicate the board comes with sensors according to a third party source.

File:Sensor stalk pinout.jpg|Pinout of the DFM-17 sensor stalk. Not all pins are used, and some seemingly are connected to a trace but end abruptly.

</gallery>

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==Reassembly==

<br />

#Insert two fresh CR123A batteries into the board.

@@ Line 20: / Line 20: @@
 *Error Correction: Code-spreading, interleaving
 *SoC: STM32F100R8T6B, 24MHz, 8KB RAM, 64KB Flash
-*GPS: Ublox MAX-M8C-0-10
+*GPS: U-Blox MAX-M8C-0-10
 *Transmitter: Si4063
+=== Peripheral attachment points ===
+* U-Blox GPS is attached to USART_2 on the STM32 via pins PA2 and PA3
+* External serial port (USB connector) is attached to USART_1 (PA9 and PA10), sharing TX/RX with the external I²C bus.
 <br />
@@ Line 31: / Line 36: @@
 File:DFM-17 NOAA Label.jpg|The label sticker NOAA(US) puts on the back of their DFM-17 radiosondes
 File:Dfm17-2layers.png|A view of the DFM-17 Radiosonde showing both layers to better assist tracing connections while reverse engineering the hardware.
+File:Label id speculaton.jpg|Possible meanings of the internal labels and values. The date code in particular which may be useful to date production times. NWS sondes have the same cryptic string printed on the outside of the sonde where the mfg. date normally is on other countries'. "TU" may just indicate the board comes with sensors according to a third party source.
+File:Sensor stalk pinout.jpg|Pinout of the DFM-17 sensor stalk. Not all pins are used, and some seemingly are connected to a trace but end abruptly.
 </gallery>
@@ Line 46: / Line 53: @@
 ==Reassembly==
+<br />
 #Insert two fresh CR123A batteries into the board.