From 62c5dbf2c4e1014910b13860ba4e6fe06f6ffd08 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Sun, 19 Sep 2021 02:20:57 +0200
Subject: improved sensors initialization

---
 files/common/openwrt/sensors-init.lua | 77 +++--------------------------------
 1 file changed, 6 insertions(+), 71 deletions(-)

(limited to 'files/common/openwrt/sensors-init.lua')

diff --git a/files/common/openwrt/sensors-init.lua b/files/common/openwrt/sensors-init.lua
index f958dd2d..a283bfc7 100755
--- a/files/common/openwrt/sensors-init.lua
+++ b/files/common/openwrt/sensors-init.lua
@@ -1,75 +1,10 @@
 #!/usr/bin/lua
 
-cjson = require "cjson.safe"
-glob = require "posix.glob"
-time = require "posix.time"
-unistd = require "posix.unistd"
+local sensors = require "sensors"
 
--- ############# utils ###########
+local config, err = sensors.read_config('/etc/sensors.json')
+if not config then error(err) end
 
-function i2c_bus_path(bus)
-    return string.format("/sys/bus/i2c/devices/i2c-%d", bus)
-end
-
-function i2c_device_path(bus, address)
-    return string.format("/sys/bus/i2c/devices/%d-%04X", bus, address)
-end
-
-function i2c_add_device(bus, name, address)
-    local f, err = io.open(i2c_bus_path(bus) .. "/new_device", "w")
-    if not f then return nil, err end
-
-    ret, err = f:write(string.format("%s 0x%02X", name, address))
-    f:close()
-    return ret, err
-end
-
-function i2c_delete_device(bus, address)
-    local f, err = io.open(i2c_bus_path(bus) .. "/delete_device", "w")
-    if not f then return nil, err end
-
-    ret, err = f:write(string.format("0x%02X", address))
-    f:close()
-    return ret, err
-end
-
-function i2c_get_mux_channels(parent, address)
-    local channels = {}
-    local channel_paths, glob_result = glob.glob(i2c_device_path(parent, address) .. "/channel-*", 0)
-    if not channel_paths then
-        if glob_result == glob.GLOB_NOMATCH then return channels end
-        if glob_result == glob.GLOB_ABORTED then return nil, "glob(): aborted" end
-        if glob_result == glob.GLOB_NOSPACE then return nil, "glob(): no space" end
-        return nil, "glob(): unknown error"
-    end
-    for _, channel_path in pairs(channel_paths) do
-        local channel = string.match(channel_path, '/channel%-(%d+)$')
-        if not channel then return nil, "unable to parse channel number from path: " .. channel_path end
-
-        local bus_path, err = unistd.readlink(channel_path)
-        if not bus_path then return nil, err end
-        local bus = string.match(bus_path, '/i2c%-(%d+)$')
-        if not bus then return nil, "unable to parse bus number from path: " .. bus_path end
-
-        channels[channel] = bus
-    end
-    return channels
-end
-
--- ############# main ###########
-
--- assert(i2c_delete_device(0, 0x70))
--- time.nanosleep({tv_sec = 0, tv_nsec = 100000000})
-assert(i2c_add_device(0, "pca9548", 0x70))
-local mux_channels, err = i2c_get_mux_channels(0, 0x70)
-if not mux_channels then error(err) end
-for ch, bus in pairs(mux_channels) do
-    print(string.format("mux channel %d -> %s", ch, i2c_bus_path(bus)))
-end
-
--- i2c_add_device(0, "ds2482", 0x18)
--- i2c_add_device(0, "ads1115", 0x48)
--- i2c_add_device(0, "bme280", 0x76)
--- i2c_add_device(0, "bmp280", 0x77)
--- i2c_add_device(0, "am2315", 0x5c)
--- i2c_add_device(0, "mcp3221", 0x4d)
+local num_sensors, err = sensors.setup(config)
+if not num_sensors then error(err) end
+print(string.format("successfully initialized %d sensor(s)", num_sensors))
-- 
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