{"id":1549,"date":"2020-04-28T08:13:23","date_gmt":"2020-04-28T00:13:23","guid":{"rendered":"https:\/\/www.strongd.net\/?p=1549"},"modified":"2020-04-28T08:13:23","modified_gmt":"2020-04-28T00:13:23","slug":"ads1115-analog-to-digital-converter-and-esp8266","status":"publish","type":"post","link":"https:\/\/www.strongd.net\/?p=1549","title":{"rendered":"ADS1115 analog-to-digital converter and ESP8266"},"content":{"rendered":"

The ADS1115 device is a precision, low-power, 16-bit, I2C-compatible, analog-to-digital converters (ADCs) offered in an ultra-small, leadless, X2QFN-10 package, and a VSSOP-10 package. The ADS1115 device incorporates a low-drift voltage reference and an oscillator. The ADS1115 also incorporate a programmable gain amplifier and a digital comparator. These features, along with a wide operating supply range, make the ADS1115 well suited for power- and space-constrained, sensor measurement applications.<\/p>\n

<\/a><\/p>\n

The ADS1115 perform conversions at data rates up to 860 samples per second (SPS). The PGA offers input ranges from \u00b1256 mV to \u00b16.144 V, allowing precise large- and small-signal measurements. The ADS1115 features an input multiplexer\u00a0 that allows two differential or four single-ended input measurements. Use the digital comparator in the ADS1115 for under- and overvoltage detection.<\/p>\n

The ADS1115 operates in either continuous-conversion mode or single-shot mode. The devices are automatically powered down after one conversion in single-shot mode; therefore, power consumption is significantly reduced during idle periods.<\/p>\n

Features<\/strong><\/p>\n

Wide Supply Range: 2.0 V to 5.5 V
\nLow Current Consumption: 150 \u00b5A
\n(Continuous-Conversion Mode)
\nProgrammable Data Rate: 8 SPS to 860 SPS
\nSingle-Cycle Settling
\nInternal Low-Drift Voltage Reference
\nInternal Oscillator
\nI2C Interface: Four Pin-Selectable Addresses
\nFour Single-Ended or Two Differential Inputs (ADS1115)
\nProgrammable Comparator (ADS1114 and ADS1115)
\nOperating Temperature Range: \u201340\u00b0C to +125\u00b0C<\/p>\n

Parts List<\/h2>\n

This module will cost less than $2<\/p>\n\n\n\n\n\n\n
Amount<\/th>\nPart Type<\/th>\n<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nADS1115<\/a><\/td>\n<\/td>\n<\/tr>\n
1<\/td>\nWemos D1 mini V2<\/a><\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Schematics\/Layout<\/h3>\n

 <\/p>\n

In the layout below we just show basic connection between Wemos Mini and ADS1115 \u2013 you can add a pot, connect an LDR to one of the A0 \u2013 A3 inputs of the ADS1115<\/p>\n

\"esp8266
esp8266 and ads1115<\/figcaption><\/figure>\n

 <\/p>\n

Code<\/h3>\n

Again we use a library and again its an adafruit one \u2013\u00a0https:\/\/github.com\/adafruit\/Adafruit_ADS1X15<\/a><\/p>\n

\n
\n
#include <Wire.h><\/span>\r\n#include <Adafruit_ADS1015.h><\/span>\r\n\u00a0\r\nAdafruit_ADS1115 ads(<\/span>0x48)<\/span>;<\/span>\r\n\u00a0\r\nvoid<\/span> setup(<\/span>void<\/span>)<\/span>\r\n{<\/span>\r\nSerial.begin<\/span>(<\/span>9600)<\/span>;<\/span>\r\nSerial.println<\/span>(<\/span>\"Hello!\"<\/span>)<\/span>;<\/span>\r\n\u00a0\r\nSerial.println<\/span>(<\/span>\"Getting single-ended readings from AIN0..3\"<\/span>)<\/span>;<\/span>\r\nSerial.println<\/span>(<\/span>\"ADC Range: +\/- 6.144V (1 bit = 3mV\/ADS1015, 0.1875mV\/ADS1115)\"<\/span>)<\/span>;<\/span>\r\n\u00a0\r\nads.begin<\/span>(<\/span>)<\/span>;<\/span>\r\n}<\/span>\r\n\u00a0\r\nvoid<\/span> loop(<\/span>void<\/span>)<\/span>\r\n{<\/span>\r\nint16_t adc0, adc1, adc2, adc3;<\/span>\r\n\u00a0\r\nadc0 =<\/span> ads.readADC_SingleEnded<\/span>(<\/span>0)<\/span>;<\/span>\r\nadc1 =<\/span> ads.readADC_SingleEnded<\/span>(<\/span>1)<\/span>;<\/span>\r\nadc2 =<\/span> ads.readADC_SingleEnded<\/span>(<\/span>2)<\/span>;<\/span>\r\nadc3 =<\/span> ads.readADC_SingleEnded<\/span>(<\/span>3)<\/span>;<\/span>\r\nSerial.print<\/span>(<\/span>\"AIN0: \"<\/span>)<\/span>;<\/span>\r\nSerial.println<\/span>(<\/span>adc0)<\/span>;<\/span>\r\nSerial.print<\/span>(<\/span>\"AIN1: \"<\/span>)<\/span>;<\/span>\r\nSerial.println<\/span>(<\/span>adc1)<\/span>;<\/span>\r\nSerial.print<\/span>(<\/span>\"AIN2: \"<\/span>)<\/span>;<\/span>\r\nSerial.println<\/span>(<\/span>adc2)<\/span>;<\/span>\r\nSerial.print<\/span>(<\/span>\"AIN3: \"<\/span>)<\/span>;<\/span>\r\nSerial.println<\/span>(<\/span>adc3)<\/span>;<\/span>\r\nSerial.println<\/span>(<\/span>\" \"<\/span>)<\/span>;<\/span>\r\n\u00a0\r\ndelay(<\/span>1000)<\/span>;<\/span>\r\n}<\/span><\/pre>\n<\/div>\n<\/div>\n
 <\/p>\n
Links<\/h3>\n
http:\/\/www.ti.com\/lit\/ds\/symlink\/ads1115.pdf<\/a><\/p>\n
I2C ADS1115 16 Bit ADC 4 channel Module with Programmable Gain Amplifier 2.0V to 5.5V RPi<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
The ADS1115 device is a precision, low-power, 16-bit, I2C-compatible, analog-to-digital converters (ADCs) offered in an ultra-small, leadless, X2QFN-10 package, and a VSSOP-10 package. The ADS1115 device incorporates a low-drift voltage reference and an oscillator. The ADS1115 also incorporate a programmable gain amplifier and a digital comparator. These features, along with a wide operating supply range, … Continue reading ADS1115 analog-to-digital converter and ESP8266<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[236],"tags":[239,237,238],"class_list":["post-1549","post","type-post","status-publish","format-standard","hentry","category-iot","tag-ads1115","tag-esp8266","tag-iot"],"_links":{"self":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/1549","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1549"}],"version-history":[{"count":1,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/1549\/revisions"}],"predecessor-version":[{"id":1550,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/1549\/revisions\/1550"}],"wp:attachment":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}