Forum >Replies by wangyf8797
Replies （10）
- You Reply: Hi, i suggest you not to use SEN0161 to detect the pH value of diluted soil. First, the principle is unreliable. After dilution, the pH value of the soil will change (unless the pH is exactly equal to 7), and secondly, if you use SEN0161 to measure impurities with soil turbidity, the data is not reliable enough and you need to increase the number of calibrations later. If the soil impurities in the solution are too large, it may affect (damage) the probe, so i would recommend you to detect wet soil with SEN0249. As for the distinction between semi-solid and wet soil you mentioned, it is not recommended to use water content as the judgement standard, since it is not easy to judge. If you can knead the soil into thick mud strips.It means that the relative humidity of the soil is about 70% and the moisture content is appropriate. Please note: 1. Ensure that the electrode can easily be penetrated a certain depth in the soil. 2. The soil should not contain any hard substances. If you still have any questions, please contact me again.
- You Reply: hi, usually the output voltage right equals the external power supply. i cannot determin the cause of this situation according to what you described,but i suggest you check again whether the jumper cap is connected correctly.(both arduino and motor shield)
if the problem is not solved,please contact me again,it is better to provide the picture that can clearly shows the connection and the board. - Topic: My own kmodelYou Reply: hi bro,sorry for my late.The saved kmodel only contains the weights, and what i learned so far is that the files mentioned in the articles(.tflite .kmodel) are not suppported.
I will contact you if there are new answers,and i am also curious about that. - You Reply: Hi bro, there is no suitable coupling for sale . You can buy one on other platforms or 3D print one so it could fit the size of the wheel and the motor perfectly.
- You Reply: Hi，bro,of course we can count the pulses of pwm. You just need to record the total running time of the motor. You can use this function: unsigned int millis (void); or unsigned int micros (void);. You can record at the beginning and at the end.Multiply the time difference by the frequency (the default value is 1000, you can set it yourself) to get the number of pulses. Since your purpose is to measure distance, it can also be calculated using the motor speed. You just need to multiply the total time by the speed. Please pay attention to the unit conversion.
- You Reply: Hello there,
This problem occurs because the baud rate (9600) in your serial port window is inconsistent with the baud rate (19200) set in the two sample codes. To solve this problem, you can: 1. Change 9600 in the serial port window to 19200 2. Change 'Serial.begin(19200);' in the code to 'Serial.begin(9600);' - Topic: DFRobot KIT0011 IOYou Reply: Hi,
Of course you can connect these sensors to a regular 5v arduino. Most sensors in this kit are compatible with 3.3v and 5v.
We recommend you use the IO expansion Shield because it is easier for you to connect multiple sensors to the controller without using a breadboard.What needs to be reminded here is that the IO expansion has a voltage switch function for output power, which can change the voltage of multiple pins at the same time, you can choose switch to 3.3v or 5v. The position of the switch function can be found in the part 'pin description' of the product wiki of the expansion. And the following modules need to work under 5v operating voltage (DFR0017, SEN0132, SEN0014). - Topic: My own kmodelYou Reply: two tips:
1. The SD card needs to be formatted as FAT32
2. When importing models, only models with the same algorithm are supported, and models with different algorithms cannot be imported. - Topic: My own kmodelYou Reply: Hi bro, it is possible to import your kmodel from an SD card into the huskylens. First, you need to make sure that the data file of the model you want to load is indeed in the SD card, and then try to import the model manually or through the program.
1. Import manually: In the parameter setting interface of the secondary menu of the object classification function, select the "import from sd card" option, and select one from 0-4 (according to your actual situation), then The model in the sd card is loaded into the huskylens.
2. Load the model through the program. You can select the corresponding module in mind + or makecode, or invoke the arduino function to save or load the model: bool saveModelToSDCard (int fileNum); bool loadModelFromSDCard (int fileNum);
If you still cann't make it after trying both methods, please contact us again. - You Reply: Hi, there.
Actually, the voice module itself does not support low power mode. It is suggested that you use switch, triode, MOS transistor or other devices to make the power supply of the module controllable, or set the Arduino board into sleep mode to achieve the purpose of power saving. For more information about Arduino sleep mode, you can read this post:http://www.gammon.com.au/forum/?id=11497