SmartSonic™ MEMS Ultrasonic ToF Sensors

I'm having an issue with Direct Pitch and Catch with the CH101 and Short Range firmware (although it happens with the normal and Pitch Catch firmware too).

Sensor 0 is set to TX/RX and Sensor 1 to RX only. I trigger the int line on both sensors, and a Pulse is sent from Sensor 0 to Sensor 1. The pulse is received by Sensor 1. Distance in this case is 195mm.

Hi, when I use the smart motion platform to evaluate ICP 10110 using the DK-10110, the csv data does not match the selected sampling frequency. In the settings I selected 20hz ODR, but the final csv file seems to only have enough samples for ~5hz odr. The same seems to happen no matter what ODR I select, there is always data missing.

I also found that the pressure was fluctuating within a range of ~10Pa even though it was sitting still on a table. Is that typical of the ICP 10110?

Hi there,

I've provided an implementation of chirp_bsp.h i.e. a board support package functions to interface Chirp SonicLib, for the Nordic nRF52840-DK. I'm having difficultly initialising the CH-201 I've got hooked up. I'm unsure of what the condition is, but sometimes the initialisation works, sometimes it doesn't. I can consistently reproduce the initialisation problem after leaving the DK unpowered for some time (like overnight).

Can anyone help to get the info on I2C protocol for CH201? Command table, description, e.t.c.

Does anybody have a pinout of the board? Or can at least tell me where the UART (Tx, Rx) Pins are?

If I disable the CH101 sensor can I utilize the CH201 sensor(s) on the DK-CH101 platform?

TIA,

-Terry

Hi, I've ported the HelloChirp Firmware to my MCU and I'm experiencing a strange behavour.
The sensor is found, the firmware is uploaded and seems to start correctly but the operating frequency resulting from RTC calibration is totally wrong.

I checked the INT line during RTC calibration and a 100ms impulse is present, as supposed.

Am I missing something?

Any suggestion would be really appreciated.

Hello everyone,

I have noticed that the CH201 firmware has the ability to set detection thresholds for up to six different sample ranges. It is a useful feature, but I would prefer using the CH101 in my project due to the smaller minimum detection distance allowed. Is there a way to set thresholds for the CH101? Thank you.

With regards,
Eric

Hello. I just trying to use CH-101 sensor in Free Run mode as it described in the ch101-00abr datasheet. I have the next problem: Sensor Range and Amplitude values does not updates. I have single sensor and following configuration:

// Success initialization (ret code is 0)

ch_init(&chirp_device, &chirp_group, 0, ch101_gpr_open_init);
// Success during initialization (ret code is 0) 

// But I wounder, that there is no Function in driver API for single sensor configuration

ch_group_start(&chirp_group);

Using DK-CH201 and the HelloChirp example, in app_config.h I:
(1) set CHIRP_SENSOR_FW_INIT_FUNC to ch201_gprmt_init
(2) enabled amplitude readout by uncommenting defines READ_AMPLITUDE_DATA and OUTPUT_AMPLITUDE_DATA
(3) Changed the value of CHIRP_SENSOR_MAX_RANGE_MM from 750 to 2500
(4)C hanged the MEASUREMENT_INTERVAL_MS from 100 to 1000
Rebuilt with no errors and reflashed the DK-CH201 OK.