Afterlooking at the Hardware Manual I'm also thinking that the I/O mux registers are complicated enough that the Arduino Core for ESP32 missed some small detail that prevents fast switching of pins 32/33 between IN and OUT. Or some other issue. The point is, OneWire works on pins 13 and 25, but doesn't on pins 32 and 33. Thedifference between the 4 pin and 7 pin connectors isn’t much. The 4 pin is to connect break lights, turn signals, emergency lights. The 7 pin connector is the same but adds electrical input for a trailer break, which isn’t available on the Highlander and is really only used for very heavy trailer loads.
Table2.4: ESP-07 and ESP-12 pin names and behavior on boot Reset Pin differences. Furthermore, the modules differ slightly in how the reset pin circuit is realized. Figure 2.2 below shows how the module's pin 1 (labeled "1") is connected to the ESP8266's reset pin (labeled "RST").
7ways are some of the most common harnesses found on trailers. 7-ways provide the required running lights, turn signals, brake lights, and ground for the trailer. In addition, they provide three additional pins for a 12V hot
Description Round, push-fit connectors available in 2-8, 13 & 14-pin versions, including 3 different 5-pin types, and 2 different 8-pin types. Line plugs, line sockets and panel mounting sockets are available. 3-8 pin types all have the same size shell, and some are interchangeable (e.g. a 3-pin plug will fit a 5-pin socket).

Withthe 13-pin wiring, you get the basic functions that are provided by the 7-pin electronics plus you get reverse lights, auxiliary power functions and a permanent

PCry.
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    • 13 pin and 7 pin difference