E32 x E22 x E220

Tagged: Comparison, e22, E220, e32

This topic has 5 replies, 2 voices, and was last updated 2 years, 10 months ago by Renzo Mischianti.

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- 17 January 2022 at 13:44 #17949
  George
  Participant
  Hi Renzo
  
  Thank you very much for sharing content about EBYTE modules. There is not much information on the internet about modules. Your forum has the best content about EBYTE modules.
  
  I’m looking for a document that informs the main differences in functionality between the E32 x E22 x E220 modules.
  
  In a forum post, it was informed that it is not possible to measure the RSSI of the E32 and does not have a repeater function. And in another post, informs that the E220 is a simplified version E22.
```
No E32 doesn’t have RSSI and repeater function.

E22 can reach a greater distance with less power:
from 3Km of E32 to 4/5Km of E22
from 8Km of E32 1W to 10/12Km of E22
The packet size of E22 is configurable from 32Kb to 240Kb.
```
  Link: http://mischianti.org/forums/topic/constructor-difference-and-hardwareserial-and-softwareserial-difference/#post-6010
  
  I couldn’t find any more information than that.
  
  Thank you so much
- 17 January 2022 at 15:01 #17954
  Renzo Mischianti
  Keymaster
  Hi George,
  we can schematize like so:
```
                       E32                       E22                       E220
Chip                   sx1276-sx1278             sx1262-sx1268             LLCC68
Range                  3Km - 8Km                 5km - 11km                5Km - 10Km
Repeater               No repeater               Repeater                  No repeater
Remote conf            No                        Yes                       No

Power consumption      Best                      Good                      Very Good
                       Sleep 4μA                 Sleep 496μA               Sleep 6μA
Transmission and receiving have similar power consumption.

Message size bytes     58                        240                       200
Buffer size bytes      512 (ok)                  1000 (good)               400 (why?????)

Max air data rate (bps) 19.2k                    62.5k                     62.5k

Encryption             One standard              Configurable              Configurable crypt
Price                  Less expensive            More expensive            Less expensive
```
  I think all devices are valid, but we must pay attention to buffer size, security and prices.
  
  I think the E220 is a candidate for the best device, but 400b of the buffer can be dangerous if you want to use the max packet size and receive three messages simultaneously, you can lose one of them.
  
  The E32, if you can find It at the best price, has a good compromise of all characteristics. But if you have sensing information, you can’t choose it; another pirate E32 can read your information (It must know frequencies, etc., not so simple).
  
  If you have a reasonable budget, the E22 has the best characteristics, but sensing on power consumption (even if It’s low) from 4μA to 496μA can be a big step.
  
  Bye Renzo
  - 7 February 2022 at 20:08 #18461
    George
    Participant
    Hi Renzo
    
    Thank you very much for your dedication and willingness to provide libraries for EBYTE’s E32, E22, and E220 modules.
    
    About your observation:
    “I think the E220 is a candidate for the best device, but 400b of the buffer can be dangerous if you want to use the max packet size and receive three messages simultaneously, you can lose one of them.”
    
    I was wondering how critical this would be in a production environment.
    
    First, do Semtech modules have a storage buffer (or is it just an EBYTE increment)?
    In the case of the E220, considering that each “Message size bytes” is 200 bytes, and the “Buffer size bytes” is 400, I wanted to know how this can be something critical in the production environment.
    
    Fictitious Example:
    If in a period of 5 seconds, a gateway/ESP32/E200 receives 3 messages of 200 bytes, can one of them be lost?
    How long does an E220 take to process a 200-byte message and transmit it to the microcontroller (eg: E220 -> ESP32)?
    
    Sorry to bother you, but I’m trying to understand from an operational perspective how critical this is.
    
    Thank you for your attention.
  - 8 February 2022 at 08:57 #18463
    Renzo Mischianti
    Keymaster
    Hi George,
    you must consider the time to read from serial, after read, the reader data are removed from the buffer.
    I think it’s very difficult that you lost data.
    But depending on the type of application.
    Bye Renzo
- 19 January 2022 at 14:42 #17961
  erik vdb
  Hi George,
  Besides the usage differences between E22 and E220, the register structure is somewhat different, so one can’t use the same library for E22 and E220. E220’s registers do not contain a field for the NETID byte. E22O does also not have repeater mode.
  However, E22 can talk to E220 : after the 2 bytes for the module address, you just have to put 0 as network address, as E220 dos not have a register for that. Good luck!
- 20 January 2022 at 15:15 #17964
  Renzo Mischianti
  Keymaster
  Hi,
  Erik is faithful, but I release the library for E220 in the following weeks, and the library for E22 is here.
  
  Ebyte LoRa E22 device for Arduino, esp32 or esp8266: library – 2
  
  Bye Renzo
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