Hello,
I saw in the comment section of the tutorial “Setting up a Rover Base RTK System”; that when we need to have a single base and multiple rovers in a place where a mobile connection is not possible, it is recommended to Pick a radio that is just broadcast, hence I’m a bit confused and my questions are the following:
*How many broadcast radios do we need? Is it only for the base? or Do we need the same radios for the rovers?
*If the broadcast radio is only for the base, which radio should be implemented on the Rovers? Where Can we look for that kind of radio? Or which specification should the radios have?
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In our project, we have a distance of 1000 m. between the base and the rovers and we’re in a location where a mobile connection is not possible, so Do you have in mind a radio that complies with our project distance (1000 m) and that at the same time the base can connect with multiple rovers?
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The rovers that we plan to connect are Sparkfun RTK Express +, whereas the base is Sparkfun RTK Surveyor.
Any hint will be highly appreciated
One broadcaster, and as many receivers as needed…getting several of these https://www.sparkfun.com/products/18215 (or similar, maybe this https://www.sparkfun.com/products/18572 ) would likely work well, though keep in-mind that having line-of-sight is needed for LoRa
They don’t necessarily need to be the same radios, but they do need to be able to transmit/receive in the same frequency range.
Thank you so much for your help. I am new in this topic and I just want to be sure that I understood correctly, so I have a few questions:
*Is the " https://www.sparkfun.com/products/18215 (LoRa-E5 Development Kit) recommended for both the base ( broadcast) and Rover (Receivers)?
*is the configuration of this radio similar to the “Telemetry Radio 915 mH 100 mW” in the u-Center? for example, is the baud rate the same as "Telemetry Radio 915 "? or is the UART2 and USB configuration in the u-Center similar to “Telemetry Radio 915 mH 100 mW”?
*which aspect in the configuration should I change based on this radio? or where can I find a tutorial for this kind of radio?
Thank you so much for your response.
TS-Russell:
One broadcaster, and as many receivers as needed…getting several of these https://www.sparkfun.com/products/18215 (or similar, maybe this https://www.sparkfun.com/products/18572 ) would likely work well, though keep in-mind that having line-of-sight is needed for LoRa
They don’t necessarily need to be the same radios, but they do need to be able to transmit/receive in the same frequency range.
Thank you so much for your help. I am new in this topic and I just want to be sure that I understood correctly, so I have a few questions:
*Is the " https://www.sparkfun.com/products/18215 (LoRa-E5 Development Kit) recommended for both the base ( broadcast) and Rover (Receivers)?
*is the configuration of this radio similar to the “Telemetry Radio 915 mH 100 mW” in the u-Center? for example, is the baud rate the same as "Telemetry Radio 915 "? or is the UART2 and USB configuration in the u-Center similar to “Telemetry Radio 915 mH 100 mW”?
*which aspect in the configuration should I change based on this radio? or where can I find a tutorial for this kind of radio?
Thank you so much for your response.
They are transceivers, so yes…they can do either (the base/rover/broadcast/receive is controlled by the RTK unit; wired the radio board to the UART coming out of the RTK)
Yes, it’s similar, though those radios are paired out-of-the-box so now further config is required. I’d recommend hooking up 2 radio boards, getting them to pass serial messages from one to the other via uploading arduino programs to them, and then wire to the UART coming out of the RTK and you’re all set.
Shame how much these shortages are a pain :-/ (it’d be a lot easier with the regular radios)
As for baud rate, check the specs of the LoRa board…but 115200 is common, 19200, and 9600 are the 3 most common ones if you wanna guess-and-check
TS-Russell:
They are transceivers, so yes…they can do either (the base/rover/broadcast/receive is controlled by the RTK unit; wired the radio board to the UART coming out of the RTK)
Yes, it’s similar, though those radios are paired out-of-the-box so now further config is required. I’d recommend hooking up 2 radio boards, getting them to pass serial messages from one to the other via uploading arduino programs to them, and then wire to the UART coming out of the RTK and you’re all set.
Shame how much these shortages are a pain :-/ (it’d be a lot easier with the regular radios)
As for baud rate, check the specs of the LoRa board…but 115200 is common, 19200, and 9600 are the 3 most common ones if you wanna guess-and-check
Thank you so much, you’re helping a lot, It’s highly appreciated. However, I have more questions which are the following:
*Do I need to use two radios / two boards for the Base and for each Rover?, so Do I need to buy two kits of LoRa-E5 for the base and for each rover? or did I misunderstand?
*When you said “wired the radio board to the UART coming out of the RTK”, is it the same procedure as when I wired the “Telemetry Radio 915 mH 100 mW” ? or is it a different procedure?
*Do you know where Can I find a tutorial to “pass serial messages from one to the other via uploading Arduino”? I’m really new at coding so I’m concerned.
Thanks again for your help.
Thank you so much, you’re helping a lot, It’s highly appreciated. However, I have more questions which are the following:
*when You mentioned hooking up two boards, Does it implies that I need to use two radios for each receiver and broadcaster?
*When you said “wired the radio board to the UART coming out of the RTK”, is it the same procedure specified in the tutorial “Setting up a Rover Base RTK System” ? or is it a different procedure?
*Do you know where Can I find a tutorial to “pass serial messages from one to the other via uploading Arduino”? I’m really new at coding so I’m concerned.
Additionally, In a case, I had a distance between the base and rovers around 300 m. Could I use the “Telemetry Radio 915 mH 100 mW” as a broadcaster in my base and connect with multiple rovers? or Would I need another radio? Which radio would you recommend?
Thanks again for your help.