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| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | .reuse/dep5 | 9 | ||||
| -rw-r--r-- | LICENSES/BSD-2-Clause.txt | 9 | ||||
| -rw-r--r-- | LICENSES/CC0-1.0.txt | 121 | ||||
| -rw-r--r-- | README.md | 76 | ||||
| -rw-r--r-- | init.lua | 110 | ||||
| -rw-r--r-- | temt6000.lua | 17 |
7 files changed, 343 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..338c30b --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +config.lua diff --git a/.reuse/dep5 b/.reuse/dep5 new file mode 100644 index 0000000..dc8ac22 --- /dev/null +++ b/.reuse/dep5 @@ -0,0 +1,9 @@ +Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ + +Files: init.lua temt6000.lua +Copyright: 2024 Birte Kristina Friesel +License: BSD-2-Clause + +Files: README.md .gitignore +Copyright: 2024 Birte Kristina Friesel +License: CC0-1.0 diff --git a/LICENSES/BSD-2-Clause.txt b/LICENSES/BSD-2-Clause.txt new file mode 100644 index 0000000..5f662b3 --- /dev/null +++ b/LICENSES/BSD-2-Clause.txt @@ -0,0 +1,9 @@ +Copyright (c) <year> <owner> + +Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: + +1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/LICENSES/CC0-1.0.txt b/LICENSES/CC0-1.0.txt new file mode 100644 index 0000000..0e259d4 --- /dev/null +++ b/LICENSES/CC0-1.0.txt @@ -0,0 +1,121 @@ +Creative Commons Legal Code + +CC0 1.0 Universal + + CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE + LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN + ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS + INFORMATION ON AN "AS-IS" BASIS. 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Waiver. To the greatest extent permitted by, but not in contravention +of, applicable law, Affirmer hereby overtly, fully, permanently, +irrevocably and unconditionally waives, abandons, and surrenders all of +Affirmer's Copyright and Related Rights and associated claims and causes +of action, whether now known or unknown (including existing as well as +future claims and causes of action), in the Work (i) in all territories +worldwide, (ii) for the maximum duration provided by applicable law or +treaty (including future time extensions), (iii) in any current or future +medium and for any number of copies, and (iv) for any purpose whatsoever, +including without limitation commercial, advertising or promotional +purposes (the "Waiver"). 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Should any part of the License for any +reason be judged legally invalid or ineffective under applicable law, such +partial invalidity or ineffectiveness shall not invalidate the remainder +of the License, and in such case Affirmer hereby affirms that he or she +will not (i) exercise any of his or her remaining Copyright and Related +Rights in the Work or (ii) assert any associated claims and causes of +action with respect to the Work, in either case contrary to Affirmer's +express Statement of Purpose. + +4. Limitations and Disclaimers. + + a. No trademark or patent rights held by Affirmer are waived, abandoned, + surrendered, licensed or otherwise affected by this document. + b. Affirmer offers the Work as-is and makes no representations or + warranties of any kind concerning the Work, express, implied, + statutory or otherwise, including without limitation warranties of + title, merchantability, fitness for a particular purpose, non + infringement, or the absence of latent or other defects, accuracy, or + the present or absence of errors, whether or not discoverable, all to + the greatest extent permissible under applicable law. + c. Affirmer disclaims responsibility for clearing rights of other persons + that may apply to the Work or any use thereof, including without + limitation any person's Copyright and Related Rights in the Work. + Further, Affirmer disclaims responsibility for obtaining any necessary + consents, permissions or other rights required for any use of the + Work. + d. Affirmer understands and acknowledges that Creative Commons is not a + party to this document and has no duty or obligation with respect to + this CC0 or use of the Work. diff --git a/README.md b/README.md new file mode 100644 index 0000000..9960e2d --- /dev/null +++ b/README.md @@ -0,0 +1,76 @@ +# ESP8266 Lua/NodeMCU module for TEMT6000 illuminance sensors + +This repository contains an ESP8266 NodeMCU Lua module (`temt6000.lua`) as well +as MQTT / HomeAssistant / InfluxDB integration example (`init.lua`) for +**TEMT6000** illuminance sensors connected via analog output. + +## Dependencies + +temt6000.lua has been tested with Lua 5.1 on NodeMCU firmware 3.0.1 (Release +202112300746, integer build). It requires the following modules. + +* adc + +Most practical applications (such as the example in init.lua) also need the +following modules. + +* gpio +* mqtt +* node +* tmr +* wifi + +## Setup + +Connect the TEMT6000 sensor to your ESP8266/NodeMCU board as follows. + +* TEMT6000 GND → ESP8266/NodeMCU GND +* TEMT6000 VCC → ESP8266/NodeMCU 3V3 +* TEMT6000 OUT → ESP8266/NodeMCU A0 + +Note that the TEMT6000 output will range from 0V to 3V3, whereas ESP8266 A0 +only accepts up to 1V. Most NodeMCU boards use a voltage divider to connect +NodeMCU A0 to ESP8266 A0 and are capable of handling up to 3V3 at A0. + +## Usage + +Copy **temt6000.lua** to your NodeMCU board and set it up as follows. + +```lua +temt6000 = require("temt6000") + +-- can be called as often as the ADC permits +function some_timer_callback() + local lx, raw = temt6000.read() + if lx ~= nil then + -- lx: estimated illuminance [lx] + -- raw: raw ADC counts + -- Note that lx is limited to a usable range of about 20 to 2500 lx. + -- Darkness cannot be detected properly, + -- anything brighter than ~2500 lx will be reported as 2500 lx. + else + print("TEMT6000 error") + end +end +``` + +## Application Example + +**init.lua** is an example application with HomeAssistant integration. +To use it, you need to create a **config.lua** file with WiFI and MQTT settings: + +```lua +station_cfg = {ssid = "...", pwd = "..."} +mqtt_host = "..." +``` + +Optionally, it can also publish readings to InfluxDB. +To do so, configure URL and attribute: + +```lua +influx_url = "..." +influx_attr = "..." +``` + +Readings will be published as `temt6000[influx_attr] illuminance_lx=%d,adc_counts=%d`. +So, unless `influx_attr = ''`, it must start with a comma, e.g. `influx_attr = ',device=' .. device_id`. diff --git a/init.lua b/init.lua new file mode 100644 index 0000000..646df3b --- /dev/null +++ b/init.lua @@ -0,0 +1,110 @@ +publishing_mqtt = false +publishing_http = false + +watchdog = tmr.create() +push_timer = tmr.create() +chip_id = string.format("%06X", node.chipid()) +device_id = "esp8266_" .. chip_id +mqtt_prefix = "sensor/" .. device_id +mqttclient = mqtt.Client(device_id, 120) + +dofile("config.lua") + +print("TEMT6000 " .. chip_id) + +ledpin = 4 +gpio.mode(ledpin, gpio.OUTPUT) +gpio.write(ledpin, 0) + +temt6000 = require("temt6000") +i2c.setup(0, 1, 2, i2c.SLOW) + +function log_restart() + print("Network error " .. wifi.sta.status()) +end + +function setup_client() + print("Connected") + gpio.write(ledpin, 1) + publishing_mqtt = true + mqttclient:publish(mqtt_prefix .. "/state", "online", 0, 1, function(client) + publishing_mqtt = false + push_timer:start() + push_data() + end) +end + +function connect_mqtt() + print("IP address: " .. wifi.sta.getip()) + print("Connecting to MQTT " .. mqtt_host) + mqttclient:on("connect", hass_register) + mqttclient:on("offline", log_restart) + mqttclient:lwt(mqtt_prefix .. "/state", "offline", 0, 1) + mqttclient:connect(mqtt_host) +end + +function connect_wifi() + print("WiFi MAC: " .. wifi.sta.getmac()) + print("Connecting to ESSID " .. station_cfg.ssid) + wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, connect_mqtt) + wifi.eventmon.register(wifi.eventmon.STA_DHCP_TIMEOUT, log_restart) + wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, log_restart) + wifi.setmode(wifi.STATION) + wifi.sta.config(station_cfg) + wifi.sta.connect() +end + +function push_data() + local lx, raw = temt6000.read() + if lx == nil then + print("TEMT6000 error") + else + local json_str = string.format('{"illuminance_lx": %d, "adc_counts": %d, "rssi_dbm": %d}', lx, raw, wifi.sta.getrssi()) + local influx_str = string.format("illuminance_lx=%d,adc_counts=%d", lx, raw) + if not publishing_mqtt then + publishing_mqtt = true + watchdog:start(true) + gpio.write(ledpin, 0) + mqttclient:publish(mqtt_prefix .. "/data", json_str, 0, 0, function(client) + publishing_mqtt = false + if influx_url and influx_attr and influx_str then + publish_influx(influx_str) + else + gpio.write(ledpin, 1) + collectgarbage() + end + end) + end + end +end + +function publish_influx(payload) + if not publishing_http then + publishing_http = true + http.post(influx_url, influx_header, "temt6000" .. influx_attr .. " " .. payload, function(code, data) + publishing_http = false + gpio.write(ledpin, 1) + collectgarbage() + end) + end +end + +function hass_register() + local hass_device = string.format('{"connections":[["mac","%s"]],"identifiers":["%s"],"model":"ESP8266 + TEMT6000","name":"TEMT6000 %s","manufacturer":"derf"}', wifi.sta.getmac(), device_id, chip_id) + local hass_entity_base = string.format('"device":%s,"state_topic":"%s/data","expire_after":600', hass_device, mqtt_prefix) + local hass_lx = string.format('{%s,"name":"Illuminance","object_id":"%s_illuminance","unique_id":"%s_illuminance","device_class":"illuminance","unit_of_measurement":"lx","value_template":"{{value_json.illuminance_lx}}"}', hass_entity_base, device_id, device_id) + local hass_rssi = string.format('{%s,"name":"RSSI","object_id":"%s_rssi","unique_id":"%s_rssi","device_class":"signal_strength","unit_of_measurement":"dBm","value_template":"{{value_json.rssi_dbm}}","entity_category":"diagnostic"}', hass_entity_base, device_id, device_id) + + mqttclient:publish("homeassistant/sensor/" .. device_id .. "/illuminance/config", hass_lx, 0, 1, function(client) + mqttclient:publish("homeassistant/sensor/" .. device_id .. "/rssi/config", hass_rssi, 0, 1, function(client) + collectgarbage() + setup_client() + end) + end) +end + +watchdog:register(180 * 1000, tmr.ALARM_SEMI, node.restart) +push_timer:register(20 * 1000, tmr.ALARM_AUTO, push_data) +watchdog:start() + +connect_wifi() diff --git a/temt6000.lua b/temt6000.lua new file mode 100644 index 0000000..472148c --- /dev/null +++ b/temt6000.lua @@ -0,0 +1,17 @@ +local temt6000 = {} + +function temt6000.read() + local raw = adc.read(0) + if raw < 70 then + return raw + end + if raw == 1024 then + return 2500, raw + end + if raw < 300 then + return (raw-70) * 2, raw + end + return raw * 2, raw +end + +return temt6000 |