This is an old revision of the document!
Indicators
There are three LED indicators on the front of the ezeio. These can provide valuable information about the status of the unit and how the communication is working.
| Indicator | Purpose |
|---|---|
| Ethernet | Shows the status if the Ethernet connection |
| Cellular | Shows the status of the cellular wireless connection |
| Server | Shows the status of the server communication and if the internal logic is running |
If neither the Ethernet or the Cellular connection is successful, the connection to the server is not possible, so the Server LED will only be green if at least one of the Ethernet or Cellular connection are also green.
Startup sequence
Immediately on startup or reset, the LED's will show a green/red 'running' pattern for a few seconds.
If during startup the Ethernet and Cellular LED's flash RED rapidly while the Server LED is off, this means the input voltage is too high (>30 VDC).
If during startup the Cellular and Server LED's flash RED rapidly while the Ethernet LED is off, this means the input voltage is too low (<10.5 VDC).
Normal operation
During normal operation, each of the LED's will indicate the status if it's resource independent of the other LED's. Please check each LED's pattern against the below tables.
The ETHERNET indicator
 | OFF | No Ethernet (physical) connection |
 | GREEN | Ethernet connection established |
 | slow RED blink | Ethernet connection disabled (in software) |
 | RED - RED - RED - pause | Waiting for DHCP server |
 | RED - RED - GREEN - pause | Fixed IP set. Looking for DNS. |
 | RED - GREEN - GREEN - pause | DHCP address acquired. Looking for DNS. |
 | slow GREEN blink | Fixed IP set. No gateway programmed. LAN comm only. |
The CELLULAR indicator
| | OFF | Cell modem is off / not available |
 | GREEN, short off 1-5 times | Connected to network. 1-5 signal quality (5 is best) |
 | fast RED blink | Cell modem powered off by software |
 | short RED pulse 1s apart | Trying to start up cell modem |
 | short RED pulse 20s apart | SIM not detected / faulty / locked |
| | RED - RED - RED - pause | Searching for cellular carrier network |
| | RED - RED - GREEN - pause | Network found. Trying to register. |
| | RED - GREEN - GREEN - pause | Registered with network. Trying to get data connection. |
 | RED - GREEN alternating | Cellular connection lost. Trying to re-establish. |
 | RED | Cellular connection lost. Waiting to reconnect. |
| | RED slow blink | Cellular connection lost. Required to back off before retrying. |
The SERVER indicator
| | OFF | No connection to server. Logic is not active. |
| | RED | No connection to server. Logic is running. |
| | RED - GREEN | Connected to server. Logic is not active. |
| | GREEN | Connected to server. Logic is running. |
It is normal that the server LED will flicker while green. This indicates normal communication activity.