Hi all, I am looking for a long range obstacle detector, which has a more reliable and higher range than the normal 5 € Ultrasonic sensors. Even lidar sensors with 10 meters range are not enough. I am looking for a sensor (lidar or sonar doesn't matter) which detects objects up to 100 meters away and is preferably water repellent.
I was thinking of using a Bosch MRR1-Plus from a car, however you don't get specific information from the manufacturer on the exact pinout.
Can anyone help me out here?
Many thanks in advance.
may be from this? (BOSCH: MRR1Crn and MRR1CrnCR technical description)
Thank you very much for the quick reply. This document is exactly what I am looking for! Do you have me a link to the full document? Is it possible to use the CAN protocol with the Arduino?
I had it under the "this" word in the previous post
i have actually found the document. Can you help me with the topic of data exchange between arduino and sensor? How do I make the arduino communicate with a CAN sensor?
there are CAN shields for Arduino and associated CAN libraries to handle the protocol
lots of CAN libraries, check Communication - Arduino Reference
- 107-Arduino-MCP2515: Arduino library for controlling the MCP2515 in order to receive/transmit CAN frames.
- autowp-mcp2515: Arduino MCP2515 CAN interface library
- CAN: An Arduino library for sending and receiving data using CAN bus.
- CAN Adafruit Fork: An Arduino library for sending and receiving data using CAN bus.
- CanBusData_asukiaaa: It defines data frame of CAN bus.
- CanBusMCP2515_asukiaaa: It communicate with MCP2515 or MCP25625 on SPI to use CAN Bus.
for example, the adafruit fork is tested with this Compatible Hardware
- Adafruit Feather M4 CAN Express and other SAM E5x microcontrollers
- Microchip MCP2515 based boards/shields
- Espressif ESP32's built-in SJA1000 compatible CAN controller with an external 3.3V CAN transceiver
There are surface mount AVR's with CAN bus built-in just as some have USB.
Shields... cost overmuch because of board space.
If a lidar rangefinder would do what you want ("obstacle detector" is ambiguous to me), consider the Benewake TF03-180, a $250 lidar rangefinder with a claimed maximum distance of 180m. They also have 100m version (which I have used as a beam break sensor with an ESP32).
I have meanwhile ordered a CAN module with the said chip and used it in combination with a car radar sensor. However, no signal is received in the sample code of the library. When I read the CAN high port of the sensor with the Arduino, I get the output seen in the screenshot. To me this looks like a CAN protocol. Nevertheless the Arduino does not receive a signal from the CAN to SPI board. What can be the reason for this?
Radar has a minimum range, 1/2 the length of the pulse emitted with length as time x C ( ~300 m / usec ) plus time/length to switch from pulse to listen.
I once used a radar with minimum range of 250 m, designed and made in the 50's, it worked so well they didn't upgrade for a real long time!
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