Wirnet™ i-series

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====== iBTS Semtech HALV2 v3.3.0 - Instructions ======

===== Compilation =====

To simplify deployment on board, Kerlink provides a script called **build_package.sh**. It must be modified to set correct the toolchain according to the platform used: Change the YOCTO_TOOLCHAIN_ENV variable at begin of this script.\\
This tool script make all tools and prepare an OPKG package including them. 

To compile it, please use following commands:
<code bash>
cd lora_gateway_v2
source /opt/toolchains/loraV2/environment-setup-cortexa9hf-neon-poky-linux-gnueabi
make SPI_HOST=imx
</code>

\\ \\
===== Usage =====

The main modification in tools since HALv1 is the '-d' argument. \\
As this HAL is mainly designed to handle multiple RF chips, this optional argument allows to specify which spidevice to use.

Kerlink provides a automatic discovery script at startup to handle correctly plugged boards.

By default, if a WAN module is provided, loraloc modules are mapped from slot 2.

So to use tools with this Loraloc module, please specify on tool's command-line **-d /dev/slot/2/spidev0**. \\
For example:
<code bash>
./pkt_logger -d /dev/slot/2/spidev0
</code>

\\ \\
===== Configuration =====

Due to architecture, the configuration is quite more complex than HAL v1:
  * **board** keyword means "Loraloc board" or "LoraLoc module" (one "board" by slot)
  * each board includes 2 **chip** configs (i.e. sx1301 configs)
  * each board includes 2 **rfchain** configs

\\
==== Chip config ====

This configuration must include SX1301 channel config. \\
These channels can be configured through "sx1301ar_conf_chan" function. \\
Please note that this function takes as "channel number" the concatenation of chip number and channel. (see function description in sx1301ar_hal.h)

\\
==== RF Chain config ====

This configuration is mainly used to correct RSSI and TX power values. \\
Corresponding calibration values are set in Production by Kerlink and extracted during board startup in ///tmp/calib_loraloc.json// file.

Thanks to ad9361 transceiver chip. We are able to get +-0.25 dBm precision on real TX power. \\
As a consequence, up to 32 power steps (tx_lut) are generated and calibrated in production.

\\
==== JSON Config ====

The JSON configuration file has been improved to simplify software by using JSON tables. \\
Indeed:
  * The main Radio config object "SX1301_array_conf" is now a table to support multiple boards
  * "rf_chain_conf" is also a 2-objects-sized table
  * "SX1301_conf" is a 2-objects-sized table
  * "tx_lut" is a variable table (up to 32 objects)
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