Getting Started with LoRa / Build a LoRa Radio Link

This video is a little primer on how to get started with the LoRa system by building a LoRa radio link and getting familiar with the LoRa radio parameters.

E32-915T30D Lora module, user manual and config software
available from Ebyte:

Software defined radio SDR# download:

The RF output power specification that we see in the data sheet of the 915T30D is the "Channel Power" measurement with the units dbm/Hz or watts/Hz. This power spectral density is the maximum allowed power we can apply to the antenna. ( Max peak conducted output power).
The 915T30D has a RF output level of 30dbm/500KHz or 1 Watt/500KHz. This is the Power Spectral Density which is a calculated value not a measured value.
It is the power present in a signal as a function of frequency. It is the integration of the instantaneous power across the wideband output signal which is calculated by the spectrum analyzer. The RF power output of a CW narrowband signal can be measured with a wattmeter. The RF output power of a wideband spread spectrum signal is the power density or channel power which is measured across the frequency range of the signal using a spectrum analyzer.

[hannesaltenfelder]

Very well explained. Just one warning for beginners: never power the ebyte-modul without an antenna connected. The modul might destroy itself if it can't send via antenna.

[vidasvv]

TNX for the upload ! Keep us posted when you solve the low power issue.
73 N8AUM

[gandsnut]

For the curious, the E32-915T30D module costs around $17 USA, (7/1/2018).

[lasersbee]

Great Lora info. Going to try this on a small long range project.
Would have liked to see some links to the parts/software you used...;-)
Can't understand why someone thumbed down this informative video.
Must have been way over his head.... LOL

[zhitailiu]

Hi, there! Thanks for this great tutorial!
I am wondering how you can display the frequency chirp in the oscilloscope?
The chirp modulation should be seen in the frequency domain, but you nicely show it in the time domain!!
What is the trick?

[gandsnut]

Having not paid enough attention to (various) Andreas Spiess' LORA vids, good to know now that peer-to-peer is entirely workable... I had thought there must be some sort of LORA 'hub' or whatever, that was necessary in one's region. Also, compliments on showing operation w/ test equipment, rather than just assembling the project then showing it works. BTW, did you actually test the spider-looking antenna? Thx.

[lars-akeclasson]

Good video. Regarding the power I´m not sure your measurment equipment is ”up to the task”. The LoRa transmission is pulsed, i.e. not a continuous signal. W = J/s. (Joules per second) and if your power meter can´t handle pulsed signals the shown Watts will be wrong. My 2 cents. Oh, 30dbm is illegal everywhere I think :-)

[youpattube]

What is the problem with the output power ?