I think I may have found the source of the problem (or at least something that needs rectifying anyway).I'm powering the arduino using the Vn pin with a 6v lantern battery and it just so happens that around the same time as the readings going a little haywire, the input voltage is dropping to below 5.5v. This is too low for the nano regulator so I'm wondering if this is causing some issues.I'll get a pair of lantern batteries tomorrow and see if that solves the problem (feed 12v into Vn instead).
It would be odd that a marginal lower voltage would cause a reading like this. But, it's worth a try. I think I'd try a different sensor like a HC-SR04 instead first. Or, try placing the sensor in a tube to try and avoid echos.Tim
Have anybody tried to use the normal HC-SR04 board connected two JSN-SR04T unit? Does this solve the blind area?
I'm sure that would be fine. There's nothing special about the length of the cable (it's not an antenna).
Hi, this is my first post here, so welcome everybody.I've bought JSN-SR04T sensor and becouse of short sensor wire I decided to extend for ~2 meter. But after soldering I found that sensor readings are not very accurate and readings are floating.Original cable sensor gave me rock stable readingsThe new cable I soldered is more less the same thickness as the original one. What should I do?I found some potentiometer trim. Should I use it to calibrate with a new cable?Edit: Once I soldered original cable again it started operate normallyThanks for your response
Thank you, Tim.So to confirm, as soon as you provide power to the PCB, you also get the steady stream of pings (i.e., if you "listen" to the sensor, you hear it ticking quickly even with no TRIGGER signal being sent) as well as a fast-blinking red LED on the PCB? Is that right?I bought 4 of these PCB/sensor kits and they all act in the same way, so I'm hoping it's not a problem with all four of the PCBs/sensors.Many thanks again.
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