top of page
Search
tearpaulalormo

Dake Bible PDF Free Download: Enjoy the Rich Insights and Study Notes of the Dake Bible



You need to be very careful to configure your radios to stay within thelegal power limits of the country you are operating in. The defaultpower level of 20dBm is fine for the US and Australia, as up to 30dBm isallowed by the LIPD class licenses there in the 915-928MHz frequencyband for a frequency hopping radio. So as long as your antennas have again of less than 10dBi you should be within the ISM rules.




3dr radio config software download



SMACCMPilot uses a custom firmware on the 3DR Radio called SMACCM-SiK. This firmware is not backwards compatible with existing 3DR Radio firmware. You will need to flash the SMACCM-SiK firmware to your 3DR Radios after receiving them from the factory. It is possible to restore your radios to the standard SiK firmware using the standard 3DR Radio firmware & configuration utility, which runs on Windows.


You may need to change parameters in the radio firmware to select a channel, frequency range, and other parameters. SMACCM-SiK is compatible with parameters setup and saved to flash from the standard SiK firmware version 1.6. You can use the 3DR Radio firmware & configuration utility to upload SiK 1.6 and configure radio parameters. You can then flash the radio to use SMACCM-SiK, and the previous saved parameters will be effective.


After you have plugged in the PC part of the HM-TRP radio in the USB port you have to make sure that the usb drivers are installed. Unsually this is not an issue on Win7. The drvice should show up in the devide manager as USB Serial device. After that you can unzip the installation directory of the HM-TRP config tool and run the 3DRRadio.exe. If you have multiple serial ports connected be sure to select the correct one in the top left corner. The connection speed is per default is set to 57600 baud.


At this point you should be able to communicate with the GPS receiver in the base station through the radio link. I started up the Ublox u-center eval software at this point just to verify that I could communicate in both directions. Make sure you disconnect or close it when you are done, or it will prevent RTKNAVI from accessing the com port.


Once you have established the radio link is working, you should be able to startup RTKNAVI and follow the instructions from the previous post to configure and run it. The only difference will be that you will probably find the radio is using a different com port than the GPS receiver so you will need to change that in the Input data stream menu.


Thank you very much for your reply. Unfortunately i still could not achieve data transmission in both directions. However, since I have preconfigured my receiver accordingly, this is also no longer mandatory. In the meantime I have upgraded my radios to 500mW and 9db antennas. I now have a good signal even to a receiving antenna not directly in sight. The radio modems have a stable connection and it shows that data is being transmitted. Unfortunately every time after converting the data with RTKCONV, I get the error no observation file in RTKLPOT. Could this be due to the overload of the bandwidth of the radios or have I made a mistake in the configuration of my receiver? UBX-RAWX is enabled on UART1, which is connected with the radio.


Hi M. If you overload the bandwidth of your radio I would expect missing observations rather than no observations. If you overload the bandwidth of the u-blox receiver UART outut baud rate however I have seen this cause no valid observations to be transmitted. A mismatch baud rate between the receiver, the radio, or the RTKLIB input is also a likely cause of invalid data. I would start by disabling all messages except for a single NMEA message and making sure this is making it through your pipeline. Once you have this working, you can try enabling the raw messages and disabling all other unnecessary messages. Be sure you have the receiver UART baud rate set high enough to support the raw messages. For limited bandwidth applications like radios, I would suggest configuring the receiver to output the more highly compressed RTCM3 messages if your receiver supports them.


In situations discussed above, it can be difficult to complete the mission with only one UAV deployed, while keeping cost and system complexity requirements met [4,5,6,7]. To harness the advantages of UAVs in these situations and minimize the drawbacks at the same time, an alternative solution is to deploy a multi-UAV system, which could utilize the inter-connectivity among multiple UAVs to maintain uninterrupted communication between every UAV and the ground control station. In this study, a UAV communication relay solution was developed, which uses relay and routing to extend the communication range and bypass obstacles at low cost. The objective was to develop and test a proof-of-concept two-UAV system that demonstrated the ability to relay radio communication. This system only consisted of two UAVs, but its design could accommodate the addition of more UAVs. The system uses one UAV as communication relay point and enables the other UAV to operate in areas where direct communication with ground control cannot be established. This configuration allows communication to be established across obstacles or over a distance exceeding the range of the onboard radio transceiver, both of which will be demonstrated in field tests later. The typical application scenario of this system is shown in Figure 1 schematically.


Abundant previous studies have focused on the algorithms for vehicle position assignment and network configuration. Choi et al. [11] developed guidance laws to optimize the position of a Micro-UAV which relayed communication and video signals when the other UAV is out of radio contact range with the base. Zhan et al. [12] investigated a communication system in which UAVs were used as relays between ground terminals and a network base station. Their work mainly focused on developing the algorithm for optimizing the performance of the relay system. In [13,14], Cetin and coworkers proposed a novel dynamic approach to the relay chain concept to maintain communication between vehicles in the long-range communication relay infrastructure. Their path planning method was based on the artificial potential field.


Start Mission Planner software. Go to Initial setup -> Optional Hardware -> Sik Radio. Configure the Baud, Airspeed and click on Save settings. Once the settings are saved, click on the option "Copy required to remote." This will configure FPV Ground and Air Radio Modules. 2ff7e9595c


0 views0 comments

Recent Posts

See All

Comentários


bottom of page