- You Reply:
Q 1#：Does this module support 3.3 V ?
Answer 1#: Sorry, this module does not support 3.3V.
Q 2#： What exactly is "Gravity" ?
Answer 2#: “Gravity” is the name of our product line, which has a standard form and interface line sequence. If you want to learn more, you can refer to https://www.dfrobot.com/gravity.html.
Q 3#：Arduino sketch looked like its TTL level signals for left or right rotation pulses - is that what it is? Is there any documentation available?
Answer 3#: The blocking photoelectric sampling sensor marks the light-transmitting area and the opaque area on the code disk with high and low pulses, and can calculate the rotation speed of the wheel by calculating the number of pulses generated by the small wheel in a certain time.
Q 4#：Do I have an alternate rotary encoder that neatly fits the Turtle 2WD chassis?
Answer 4#:Sorry, there is no other encoder available except this product - You Reply: It seems that the feedback data of two sensors is abnormal. These sensors are factory calibrated. Is the location where your sensor is placed in an environment where gas flow is easy? Have you tried to place the sensor in another position, and have the sensor parameters changed? In addition, I see that the sensor data suddenly becomes 0ppm. Can you check whether the IIC communication of these sensors is normal after the value changes?
- Topic: SEN0321 Ozone I2C SensorYou Reply: Sorry about this issue, I have communicated with the sensor supplier. The temperature compensation function is still in the development stage, and we will revise the sensor's function description.
- You Reply: We are still testing the python library files on github. If you can, can you please describe the problem you encountered in more detail?
- You Reply: Hi,
Except for the fifth parameter is abnormal, everything else is normal.It seems to be "fused" with the previous one.Do you have any arduino main control board or USB to UART device to test this module？If not, can you send me the code for testing with Raspberry Pi. - You Reply: Hi my friend,
I suggest you add the on/off button between DFR0535 and the monitoring system.You can keep DFR0535 working all the time.
The button on DFR0535 is the start button of the lithium battery protection chip, so if you cut off the power supply of the lithium battery, you have to press the start button every time you power on to start the lithium battery protection function.
But I want to know why you need cut off the monitoring system？Isn’t this system placed in the wild and always in working condition? - You Reply:
Of couse you can. But you have to connect analog singal line to A0~A4. - You Reply: Hi,
Firstly, In the wiki of SEN0193, the main control board used is UNO R3, the ADC in UNO R3 is 10-bit, values should between 0 and 1024. Beacause the voltage of UNO R3 is 5V and sensor feed back voltage is 0~3V, the value of SEN0193 is between 260 and 520. So the value you measured on the DFR0604 is between 1900 and 3500.
Second, The situation you mentioned is because there is no ground shielding between the analog interfaces. If you have 3 sensors, You can solve this problem with two DFR0504.