Setting up Multitech Conduit Gateway for TTN

@kersing Thank you for writing the updated poly_pkt_fwd!

I am in the process of trying to get it to work without any luck so far. Before I start again from scratch I thought I would ask for help. My configuration is as follows:

1. I have installed your poly-packet-forwarder_2.1-r1_arm926ejste.ipk
2. I have updated my /var/config/lora/global_conf.json based on your https://github.com/kersing/packet_forwarder/blob/master/poly_pkt_fwd/global_conf_multitech-us915.json
3. I have edited /etc/init.d/lora-network-server to run poly_pkt_fwd

My log file shows the following:

root@mathworks1:~# /etc/init.d/lora-network-server restart
Stopping lora-network-server: OK
Found lora card MTAC-LORA-915
Starting lora-network-server: OK
root@mathworks1:~# tail -f /var/log/lora-pkt-fwd.log
INFO: Beacon is disabled
INFO: Monitor is disabled
INFO: Platform configured to "MultiTech"
INFO: Contact email configured to "my@email.com"
INFO: Description configured to "MathWorks01"
INFO: Successfully contacted server 54.229.214.112
INFO: [main] Starting the concentrator
INFO: [main] concentrator started, radio packets can now be received.
INFO: [down] Thread activated for all server 54.229.214.112
INFO: [up] Thread activated for all servers.

    ##### 2016-01-05 16:34:09 GMT #####
    ### [UPSTREAM] ###
    # RF packets received by concentrator: 0
    # CRC_OK: 0.00%, CRC_FAIL: 0.00%, NO_CRC: 0.00%
    # RF packets forwarded: 0 (0 bytes)
    # PUSH_DATA datagrams sent: 0 (0 bytes)
    # PUSH_DATA acknowledged: 0.00%
    ### [DOWNSTREAM] ###
    # PULL_DATA sent: 3 (0.00% acknowledged)
    # PULL_RESP(onse) datagrams received: 0 (0 bytes)
    # RF packets sent to concentrator: 0 (0 bytes)
    # TX errors: 0
    ### [GPS] ###
    # Invalid gps time reference (age: 1452011649 sec)
    # Manual GPS coordinates: latitude 42.29956, longitude -71.35191, altitude 20 m
    ##### END #####

Here are my issues:

1. I do not see my gateway at: http://thethingsnetwork.org/api/v0/gateways/
2. I can no longer send messages to the api: http://thethingsnetwork.org/api/v0/nodes/02013E00/

3. I am receiving CRC errors now:

   ##### 2016-01-05 17:12:09 GMT #####
   ### [UPSTREAM] ###
   # RF packets received by concentrator: 1
   # CRC_OK: 0.00%, CRC_FAIL: 100.00%, NO_CRC: 0.00%
   # RF packets forwarded: 0 (0 bytes)
   # PUSH_DATA datagrams sent: 1 (221 bytes)
   # PUSH_DATA acknowledged: 0.00%
   ### [DOWNSTREAM] ###
   # PULL_DATA sent: 3 (0.00% acknowledged)
   # PULL_RESP(onse) datagrams received: 0 (0 bytes)
   # RF packets sent to concentrator: 0 (0 bytes)
   # TX errors: 0
   ### [GPS] ###
   # Invalid gps time reference (age: 1452013929 sec)
   # Manual GPS coordinates: latitude 42.29956, longitude -71.35191, altitude 20 m
   ##### END #####

and even when I appear to receive valid messages:

##### 2016-01-05 17:18:10 GMT #####
### [UPSTREAM] ###
# RF packets received by concentrator: 1
# CRC_OK: 100.00%, CRC_FAIL: 0.00%, NO_CRC: 0.00%
# RF packets forwarded: 1 (30 bytes)
# PUSH_DATA datagrams sent: 2 (473 bytes)
# PUSH_DATA acknowledged: 0.00%
### [DOWNSTREAM] ###
# PULL_DATA sent: 3 (0.00% acknowledged)
# PULL_RESP(onse) datagrams received: 0 (0 bytes)
# RF packets sent to concentrator: 0 (0 bytes)
# TX errors: 0
### [GPS] ###
# Invalid gps time reference (age: 1452014290 sec)
# Manual GPS coordinates: latitude 42.29956, longitude -71.35191, altitude 20 m
##### END #####

They do not end up at the api.

Any help would be much appreciated.