Using Bosch's Measure ON Android app, use this procedure to capture the Bluetooth communication protocol. You will be able to help us a lot to decipher the serial communication with the tape. To colleagues who have Bosch measuring tapes with Bluetooth, I have this suggestion to make. Also there was some strange data that I can't process. I tried to analyze SPI data and (as I can remember) - resulting data was looking as sinusoidal signals. Probably this laser tape measure is using phase method for distance measurement - one photosensor is used for measuring distance, another one is used as a reference channel. I suppose that this integrated sensor is containing two SiPM photosensors: SiPM sensors are containing a lot of SPAD diodes, connected in parallel, so it is not possible to say that BOSCH sensor can detect and analyze image. It has the same SOC sensor as was mentioned here. Back to topic: I tried to make reverse engineering of my BOSCH PLR15 laser tape measure a long time ago - nearly in 2015. I was more concentrated at measurements speed instead of accuracy. It would be awesome if the laser output could be tweaked for a little higher output while still maintaining accuracy.Īlso sorry for offtopic, maybe my research would we interested to someone here: I successfully completed reverse engineering hardware of a cheap chinese laser tape measure and write my own code for its MCU. It makes me thing they are just increasing the upper limit on what numbers it will display in firmware, and then increasing the laser output to cover that distance. It would also be interesting considering how it is common to see 3 or so different models of a cheap laser distance measure where they look the same but for the max range and laser intensity. The more expensive devices will have a brighter laser that allows them to do things like measure 40-50 meters outdoors, while some cheaper ones (rated for 60+ meters) will have the laser become invisible after around 15-20 meters outdoors, thus causing the unit to fail to measure the distance. Sorry if off topic, I was wondering do any of the common laser distance measuring devices have a simple way to increase the laser's output power? Most tend to do a fraction of a milliwatt, but often have laser modules that can easily do 5 milliwatts+ One of the biggest issues especially with lower cost devices, is measurements and accuracy when light levels are high or when outdoors. In lieu of the projection lens, it is possible to alternatively provide, or to additionally provide along with the projection lens, a circular aperture 53 as a projection aperture, which assures the required depth of field" This additional reception unit 19 is essentially comprised of a projection lens 51 for the triangulation and a position-sensitive detector 55. I guess you are correct ! Device and method for optical distance measurement Device and method for optical distance measurement "In addition to the embodiment that has been described up to this point, which is used essentially to determine the time delay of the measurement signal between the measurement device 10 and the target object 20, an in particular to determine such a time delay by means of a phase measurement, the device 10 according to the present invention also has an additional reception unit 19 equipped with a triangulation sensor 66.
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