Surface mount version of LoRa wireless communication module ES920LR

Long-distance mobile radio communication (Low Power Wide Area: LPWA) modules that can be used immediately after purchase are on the market. There are several kinds of LPWA, but what is called LoRa (abbreviation of Long Range) is widely used in terms of delivering small data as far as possible as far as possible.

By the way, in order to use such a LoRa wireless communication module easily and legally in Japan, we will use one approved as a technical standard compliance system. Although there are several products of the LoRa wireless communication module that has been acquired by the technique, EASEL’s ES920LR which appeared on the market early is famous. An additional ES920LR module purchased with this development kit was surface mount technology (SMT: surface mount technology, a part intended to be mounted directly on printed circuit board). Because processing is somewhat troublesome, I left this communication module for a while.

ES920LR SMT

I thought that I should use this somehow. So, we first soldered the antenna which was already acquired. Because it is receiving technical certification with a set of communication module and antenna, you can not use your favorite antenna at a later time. Next, this communication module main body was turned over, fixed with a bond on a perforated board, and wired necessary items such as a pull-up resistor and a connector. As small as possible, made consciously.

ES920LR PCB

And this board was connected to Raspberry Pi 3 and the operation test was carried out. It is success. If you are told that “show me the technique marks to indicate that it is a legitimate device” … I may peel off the bonds and show the compliance mark.

ES920LR with Raspberry Pi 3

Published on 24th January 2019