Working on PlatformIO embedded projects with STM32 and ESP32. Hardware reliability depends on connector selection too. Firmware gets most attention, hardware connections often fail. I face intermittent sensor readings and power instability. Temporary jumper wires often reduce system reliability.
How do you choose connectors in PlatformIO projects? Do you standardize connectors early in design?
Looking for practical rules from experience.
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First, I should mention that since there is no direct dependency between PlatformIO and connectors, it’s questionable whether this topic is appropriate here.
However, for reference, I will share my over 40 years of experience.
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Using breadboards and jumper wires for wiring is limited to the very early stages of verifying a very limited set of functions.
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When verifying the operation of a system, it is necessary to create a prototype board (including the interface with external units).
Each component must be properly soldered.
And connectors should be from major connector manufacturers.
Generally speaking, connectors from major manufacturers are highly reliable, and as long as you use products suitable for the operating environment, problems with evaluation in both the laboratory and the field are extremely rare. -
When errors occasionally occur with connector connections, it is almost always with cables where the contacts were crimped by the user.
This is almost never the case if the crimping is done by a specialist in cable assembly manufacturing using specialized tools.
Regarding hardware, the following order of transition is necessary:
1st:Breadboards and jumper wires for each function
2nd:System prototype board and prototype cable assembly
3rd:Production board and production cable assembly
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That workflow description matches my recent embedded project experience. I moved beyond jumper wires after repeated vibration failures. Motor noise also affected unstable sensor communication occasionally. Now I am researching locking connector systems for reliability. I started comparing JST, Molex, and TE connector families. This article explained what is a molex connector. I also found SparkFun’s connector basics tutorial very useful. Many robotics prototypes still depend heavily on Dupont jumpers. Those connections loosen during transport or continuous testing sessions. Proper crimping quality also seems critical for long term stability.