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--- nyan:boxes [2024/07/27 20:42] – created river
+++ nyan:boxes [2025/05/13 08:23] (current) – river
@@ Line 2: / Line 2: @@
 Notes on Nyan prototype / development boxes I have built.
+===== Connectors =====
+The NMEA 2000 connector wires have the wrong colours. I have used the correct colours of ferrules to mark them, according to the colours tabulated in [[:nmea2000|NMEA 2000]], except that shield is marked green.
+==== Custom ====
+=== Waterproof blue connectors with 9 pins. ===
+| 1 | +12V nom. (NMEA2000 bus power), OR USB VBus (5V). |
+| 2 | Ground |
+| 3 | USB D+ |
+| 4 | USB D- |
+| 5 | CAN+ |
+| 6 | CAN- |
+| 7 | SWDIO |
+| 8 | SWDCLK |
+| 9 | Boot or Reset |
+=== Pico Internal Wiring to Connector ===
+| Red     | USB VBus |
+| Black   | Ground |
+| Yellow  | USB D+ |
+| Blue    | USB D- |
+| Grey    | Boot   |
+| Green   | SWDCLK |
+| White   | SWDIO  |
+=== Debug Cable ===
+pin blue waterproof connector for flash / debug of boxes. Pinout as above.
+Cable end has:
+  * USB plug
+  * 3 pin dupont socket as pico debug: orange: SWDCLK, black: ground, yellow: SWDIO.
+  * Brown dupont: pin 9, BOOT.
 ===== 0 =====
@@ Line 8: / Line 45: @@
   * Pi 5. Has official fan heatsink.
-  * Heltec WSL V3
+  * <del>Heltec WSL V3</del> Replaced with Heltec V3. Connector broke on the WSL.
   * INA3221. CH1: 50mR, power input. CH2: 5V converter output, voltage only.
   * Lightning sensor
@@ Line 15: / Line 52: @@
   * PoE splitter
-Pi is connected as a JTAG debug probe to the Heltec.
+<del>Pi is connected as a JTAG debug probe to the Heltec.</del>
 RS422 UART board screw terminals are connected externally. Additionally, the signals and ground are connected with soldered wires to the USB RS422 interface. The colours are misleading: green is A+, red ground, black B-.
@@ Line 22: / Line 59: @@
 uF 50V caps: One on power input before anything, and one on the buck input. A ferrite with three windings of ground, input, and 5V sense line that goes to the INA3221 board are between them.
+JTAG enable pin now connected to pi GPIO 4 via resistor.
+uF added to pi 5V header, and also to Heltec Vext pin.
+==== Wiring ====
+<code>
+pin cable:
+orange GPIO6 UART_TX
+yellow GPIO7 UART_RX
+Purple GPIO15 Lightning IRQ
+Single Blue: Reset
+pin cable:
+Green GPIO48 SDA
+Blue  GPIO47 SCL
+Purple   GND
+White   3V3
+Single Black: JTAG select (GPIO3)
+</code>
+===== 1 =====
+Metal box
+Pico W, Waveshare CAN and LoRa. Small 24V in to USB switcher.
+Uses about 60mA from 12V (0.72W), running Nyan meshtastic.