# Single-channel forwarders online for testing

> NOTE : single-channel forwarders are not LoRaWAN compliant, and can disrupt operations of other users . Single-channel forwarders should no longer be used on th

- Type: Community update
- Community: [The Things Network Haarlem](https://www.thethingsnetwork.org/community/haarlem/)
- Author: Arjan van B.
- Published: 2016-05-01
- Web page: https://www.thethingsnetwork.org/community/haarlem/post/single-channel-forwarders-online-for-testing

**NOTE**: single-channel forwarders are not LoRaWAN compliant, and [can disrupt operations of other users](https://www.thethingsnetwork.org/forum/t/low-cost-single-channel-rpi-gateway/31392/14). **Single-channel forwarders should no longer be used on the The Things Network, not even for some quick testing.**

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Just being impatient for the July delivery of the Kickstarter hardware, we've done some first experiments with single-channel forwarders and home made LoRaWAN nodes.

One test forwarder is [Thomas Telkamp's well-known Raspberry Pi single channel gateway](http://forum.thethingsnetwork.org/t/single-channel-gateway/798), another is [Maarten Westenberg's derived ESP8622 Arduino version](https://github.com/things4u/ESP-1ch-Gateway), both using [an RFM95W LoRa transceiver](http://www.hoperf.nl/RFM95W?Lng=en).

If you want to create a cheap node, then see [Maarten's & JP Meijers' instructions for an Arduino ESP8266 node](http://forum.thethingsnetwork.org/t/node-with-esp8266-and-rfm95w/1002/46). Along with JP Meijers' great TTN Mapper, [some _very_ limited first range tests](http://ttnmapper.org/?gateway=B827EBFFFF5FE05C&type=radials) have been done with such node.

True, this is nothing special yet. But: fun to make and a great way to get to know the TTN components. Get in touch if you need the gateways to be running for your own tests!