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--- tamiwiki:users:6r1d:diymall_esp32_s3_fixture [2025/10/18 20:46] – 6r1d
+++ tamiwiki:users:6r1d:diymall_esp32_s3_fixture [2025/10/20 05:43] (current) – [ESP-IDF (+ history and PWM debug)] 6r1d
@@ Line 1: / Line 1: @@
-There's something very nice about ESP32 Wroom modules: you can use fixtures to quickly debug things, remove a module, solder it and viola, you have something working.
+There’s something great about [[https://www.espressif.com/en/products/socs/esp32-s3|ESP32-WROOM]] modules: you can prototype fast, use test fixtures to debug, then pop a module off, solder it onto a board, and voilà, you’ve got a working device.
-Or a bad board. Mostly those options.
+Or a non-working one.
+//Usually// it's one of those two.
 ====== Introduction ======
@@ Line 8: / Line 9: @@
 {{:tamiwiki:users:6r1d:signal-2025-10-18-123252_002.jpeg?400|}} {{:tamiwiki:users:6r1d:signal-2025-10-18-123334_002.jpeg?400|}}
-It is very helpful as a fixture. It is not helpful whatsoever in terms of having a proper documentation. If you open the DIYMalls site, it shows 403 and doesn't give you anything.
+It is very helpful as a fixture. It is not helpful whatsoever when it comes to proper documentation. If you open the [[http://diymalls.com/|DIYMalls site]], it shows a 403 and gives you nothing.
 So, the fixture is easy to buy on AliExpress, for example, [[https://aliexpress.com/item/1005008525778779.html|here]], it works without hassle, and it will also require you trace all pins unless you have a reference.
@@ Line 47: / Line 48: @@
 ===== Notes =====
-* GPIO pin 48 is the onboard LED, usually blue.
+  * GPIO pin 48 is the onboard LED, usually blue.
-* Initially, I thought that onboard USB-UART is connected to something else than RXD0 / TXD0. It was not. It is the main UART.
+  * Initially, I thought that onboard USB-UART is connected to something else than RXD0 / TXD0. It was not. It is the main UART.
+====== Tracing code ======
-====== Tracing code: Arduino ======
+You might disagree with me and want to double-check. Excellent! More eyes (and feedback) mean better information.
-You may disagree with me and want to run a quick check. For your convenience, there's a code to do so. I didn't bother to write it manually, but I have tested it and it worked for me.
+Grab your trusty 30-year-old LED soldered to a pair of DuPont sockets and start tracing. If you don’t have one handy (like me), grab your scope instead.((Marie Antoinette reference unintended.))
+For convenience, here’s the code to do the job. I didn’t bother writing it from scratch, but I tested it, and it worked just fine for me.
+===== ESP-IDF (+ history and PWM debug) =====
+This code gives you a predictable interactive workflow with history.
+<code>
+> help
+Commands:
+  list                          -> show test-safe GPIOs
+  status                        -> show current pin/mode
+  pin <gpio>                    -> start blinking GPIO
+  <gpio>                        -> same as 'pin <gpio>'
+  delay <ms>                    -> set blink delay
+  pwm <pin> [brightness]        -> start PWM (0-99, current: 50%)
+  brightness <level>            -> set PWM brightness (0-99)
+  freq <frequency>              -> set PWM frequency (Hz)
+  stop                          -> stop and release pin
+> 48
+Stopped. Pin released to INPUT.
+Blinking GPIO 48 at 100 ms.
+> 42
+Stopped. Pin released to INPUT.
+Blinking GPIO 42 at 100 ms.
+> 47
+Stopped. Pin released to INPUT.
+Blinking GPIO 47 at 100 ms.
+> 46
+Restricted: GPIO 46 is not in the test-safe set.
+> delay 40
+Set blink delay to 40 ms.
+> delay 10
+Set blink delay to 10 ms.
+</code>
+As for using it, you should know the gist at this point.
+<code bash>
+mkdir pin_tracer && cd pin_tracer
+idf.py create-project . && idf.py reconfigure && idf.py set-target esp32s3
+# fill the code
+# update the CMake configs
+idf.py build
+idf.py flash monitor
+</code>
+For your convenience, I have shared the whole [[https://git.telavivmakers.space/6r1d/esp32_s3_pin_tracer_espidf|repository]] at TAMI Gitea.
+Clone it like that:
+<code bash>
+git clone https://git.telavivmakers.space/6r1d/esp32_s3_pin_tracer_espidf.git esp32_s3_pin_tracer
+</code>
+Also, you can use Minicom to interact with the tracing code if you'd like. It's just one of the default baudrates, 115200.
+<code bash>
+minicom -D /dev/ttyUSB0 -b 115200 -o
+</code>
+===== Arduino (basic version) =====
 Flash from Arduino IDE. Use the ESP32 board package by Espressif, pick ESP32S3 Dev Module, pick 115200 baud in Serial Monitor.

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