Running out of heap when no Google Home is found

[skezo]

Arduino IDE: 1.8.8
Arduino Core for ESP8266: 2.4.2
Board: LOLIN(WEMOS) D1 R2 & mini

Issue: Running out of heap when no Google Home is found

Steps to reproduce:

1. Add the sample code below to an ESP8266 board and connect to a network where no Google Home can be found or set the displayName to on that cannot be found
2. Loop this continuously
3. Every ghn.device call will reduce the boards heap by 224 causing an Exception 29 error (see exception error below)

#include <ESP8266WiFi.h>
#include <esp8266-google-home-notifier.h>

const char* ssid = "";
const char* password = "";
const char displayName[] = "";
GoogleHomeNotifier ghn;

void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }
}

void findGoogleHome() {
  Serial.println("connecting to Google Home...");
  if (ghn.device(displayName, "en") != true) {
    Serial.println(ghn.getLastError());
    return;
  }
  Serial.print("found Google Home(");
}

void stats() {
  Serial.printf("Free: %d\n", ESP.getFreeHeap());
}

void loop() {
  findGoogleHome();
  stats();
  delay(5000);
}

Outputted error Exception 29: StoreProhibited: A store referenced a page mapped with an attribute that does not permit stores

Exception (29):
epc1=0x402031e9 epc2=0x00000000 epc3=0x00000000 excvaddr=0x00000000 depc=0x00000000

ctx: sys 
sp: 3fffe9d0 end: 3fffffb0 offset: 01a0

>>>stack>>>
3fffeb70:  00000010 3fffbfe8 3fffbfe8 3fffbfe4  
3fffeb80:  00000010 3fffee3c 3fffee3c 40204ffb  
3fffeb90:  3fffecef 00000004 3fffee3c 40205047  
3fffeba0:  00000003 00000009 3fffee3c 3fffbfe4  
3fffebb0:  00000003 40205384 00000010 401004e8  
3fffebc0:  3fffecef 40203feb 00000010 40205384  
3fffebd0:  402041bf 00000004 3ffeedfc 40203ff0  
3fffebe0:  00000608 3ffe8ff7 baae1973 daf4b60e  
3fffebf0:  676f6f47 482d656c 2d656d6f 61356463  
3fffec00:  61393532 36366138 39656561 66643666  
3fffec10:  64316161 64323163 36616433 3ffef200  
3fffec20:  3ffef3ac 40212eec 00000008 401004e8  
3fffec30:  4020eef6 00000000 3fff01cc 40212eec  
3fffec40:  0000004c 00000000 00000001 4020c2d0  
3fffec50:  3ffef3b8 00000001 3fff01cc 4020c30c  
3fffec60:  3ffef3ac 00000000 3ffefcac 40211c7c  
3fffec70:  00000000 00000000 3fff01cc 00000001  
3fffec80:  00000005 00000000 00000020 40100f22  
3fffec90:  000005e0 00000000 40103125 3ffed540  
3fffeca0:  0000003c 00000000 3ffece50 00000100  
3fffecb0:  0000001c 00000001 4010426a 3ffed540  
3fffecc0:  3ffed510 1052f205 00000000 3ffed1b0  
3fffecd0:  00000005 00000000 00000020 40100f22  
3fffece0:  3ffe93c5 4010431f 3ffece50 6e000001  
3fffecf0:  00313d66 41434638 33443238 72003135  
3fffed00:  32370000 37444242 42433336 42313330  
3fffed10:  64004344 64323163 36616433 00000cc0  
3fffed20:  fffffff2 1332e350 4010224e 00000100  
3fffed30:  7fffffff 3ffe9c64 3ffe9c64 00000001  
3fffed40:  00000001 00006208 4010426a 3ffed540  
3fffed50:  00000000 1332e350 00000000 4000050c  
3fffed60:  3fffc278 40101fe8 3fffc200 00000022  
3fffed70:  3ffe9c70 3ffed540 3ffece50 3fffee90  
3fffed80:  4021b5d9 00000030 00000000 ffffffff  
3fffed90:  3ffed79c 000000b0 00000058 00000031  
3fffeda0:  00000031 3fffeee8 3fffeee8 00000000  
3fffedb0:  00000017 0000001d 00000019 00000080  
3fffedc0:  00000005 00000000 00000020 40100f22  
3fffedd0:  3ffe93c5 4010431f 3ffece50 42d80000  
3fffede0:  40101c3d 3ffece50 60000200 75000006  
3fffedf0:  fffffff2 1332e5a8 3ffed85c 40101e0e  
3fffee00:  3ffe9c70 00000000 00000000 6f6c9a00  
3fffee10:  006c6163 73616365 40100074 00000100  
3fffee20:  7fffffff 3ffe9c70 3ffe9c70 00000001  
3fffee30:  00008400 00000001 40230003 00000000  
3fffee40:  00000000 00000000 00000000 4010020c  
3fffee50:  3fffbfe4 00000002 00000001 00000000  
3fffee60:  3fffedf0 00000008 00000005 40212f00  
3fffee70:  40000000 00000030 00000018 3fffbcbc  
3fffee80:  3ffeedfc 3fffbc04 3ffefd34 402045ed  
3fffee90:  3ffef494 3fffbcee 3ffefd34 4020586b  
3fffeea0:  3ffef494 3fffbcee 3ffeff4c 40202eb4  
3fffeeb0:  0000018a 4010659c 3ffeff4c 4020f4c0  
3fffeec0:  00000000 000014e9 3ffef3ac 00000000  
3fffeed0:  00000000 40212eec 0000019c 3fffbcda  
3fffeee0:  3ffef3ac 3fffbcbc 3ffef494 40212668  
3fffeef0:  00000014 000018fe 000018fe 3ffef3ac  
3fffef00:  3fffdc80 3ffef954 3fffbca4 3ffef9ac  
3fffef10:  00000008 3ffef3ac 3fffbcbc 4020c1dc  
3fffef20:  3fffdc80 3ffef954 3fffbca4 4020c017  
3fffef30:  402291fa 3ffef954 3fffbca4 4022920b  
3fffef40:  3fffbccc 3fffbcbc 00000002 3fffdcb0  
3fffef50:  40224107 00000000 3fffbca4 4022b14b  
3fffef60:  40000f49 3fffdab0 3fffdab0 40000f49  
3fffef70:  40000e19 40001878 00000002 00000000  
3fffef80:  3fffff10 aa55aa55 0000003b 40104424  
3fffef90:  4010442a 00000002 00000000 b8c46543  
3fffefa0:  4010000d 3fffef3c 40100985 3ffffd78  
3fffefb0:  40100774 3fffef4c 40100721 3ffffe78  
3fffefc0:  3fffffd0 00000000 00000000 feefeffe  
3fffefd0:  feefeffe feefeffe feefeffe feefeffe  
3fffefe0:  feefeffe feefeffe feefeffe feefeffe  
3fffeff0:  feefeffe feefeffe feefeffe feefeffe  
3ffff000:  feefeffe feefeffe feefeffe feefeffe  
3ffff010:  feefeffe feefeffe feefeffe feefeffe  
3ffff020:  feefeffe feefeffe feefeffe feefeffe  
3ffff030:  feefeffe feefeffe feefeffe feefeffe  
3ffff040:  feefeffe feefeffe feefeffe feefeffe  
3ffff050:  feefeffe feefeffe feefeffe feefeffe  
3ffff060:  feefeffe feefeffe feefeffe feefeffe  
3ffff070:  feefeffe feefeffe feefeffe feefeffe  
3ffff080:  feefeffe feefeffe feefeffe feefeffe  
3ffff090:  feefeffe feefeffe feefeffe feefeffe  
3ffff0a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff0b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff0c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff0d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff0e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff0f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff100:  feefeffe feefeffe feefeffe feefeffe  
3ffff110:  feefeffe feefeffe feefeffe feefeffe  
3ffff120:  feefeffe feefeffe feefeffe feefeffe  
3ffff130:  feefeffe feefeffe feefeffe feefeffe  
3ffff140:  feefeffe feefeffe feefeffe feefeffe  
3ffff150:  feefeffe feefeffe feefeffe feefeffe  
3ffff160:  feefeffe feefeffe feefeffe feefeffe  
3ffff170:  feefeffe feefeffe feefeffe feefeffe  
3ffff180:  feefeffe feefeffe feefeffe feefeffe  
3ffff190:  feefeffe feefeffe feefeffe feefeffe  
3ffff1a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff1b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff1c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff1d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff1e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff1f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff200:  feefeffe feefeffe feefeffe feefeffe  
3ffff210:  feefeffe feefeffe feefeffe feefeffe  
3ffff220:  feefeffe feefeffe feefeffe feefeffe  
3ffff230:  feefeffe feefeffe feefeffe feefeffe  
3ffff240:  feefeffe feefeffe feefeffe feefeffe  
3ffff250:  feefeffe feefeffe feefeffe feefeffe  
3ffff260:  feefeffe feefeffe feefeffe feefeffe  
3ffff270:  feefeffe feefeffe feefeffe feefeffe  
3ffff280:  feefeffe feefeffe feefeffe feefeffe  
3ffff290:  feefeffe feefeffe feefeffe feefeffe  
3ffff2a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff2b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff2c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff2d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff2e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff2f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff300:  feefeffe feefeffe feefeffe feefeffe  
3ffff310:  feefeffe feefeffe feefeffe feefeffe  
3ffff320:  feefeffe feefeffe feefeffe feefeffe  
3ffff330:  feefeffe feefeffe feefeffe feefeffe  
3ffff340:  feefeffe feefeffe feefeffe feefeffe  
3ffff350:  feefeffe feefeffe feefeffe feefeffe  
3ffff360:  feefeffe feefeffe feefeffe feefeffe  
3ffff370:  feefeffe feefeffe feefeffe feefeffe  
3ffff380:  feefeffe feefeffe feefeffe feefeffe  
3ffff390:  feefeffe feefeffe feefeffe feefeffe  
3ffff3a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff3b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff3c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff3d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff3e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff3f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff400:  feefeffe feefeffe feefeffe feefeffe  
3ffff410:  feefeffe feefeffe feefeffe feefeffe  
3ffff420:  feefeffe feefeffe feefeffe feefeffe  
3ffff430:  feefeffe feefeffe feefeffe feefeffe  
3ffff440:  feefeffe feefeffe feefeffe feefeffe  
3ffff450:  feefeffe feefeffe feefeffe feefeffe  
3ffff460:  feefeffe feefeffe feefeffe feefeffe  
3ffff470:  feefeffe feefeffe feefeffe feefeffe  
3ffff480:  feefeffe feefeffe feefeffe feefeffe  
3ffff490:  feefeffe feefeffe feefeffe feefeffe  
3ffff4a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff4b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff4c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff4d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff4e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff4f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff500:  feefeffe feefeffe feefeffe feefeffe  
3ffff510:  feefeffe feefeffe feefeffe feefeffe  
3ffff520:  feefeffe feefeffe feefeffe feefeffe  
3ffff530:  feefeffe feefeffe feefeffe feefeffe  
3ffff540:  feefeffe feefeffe feefeffe feefeffe  
3ffff550:  feefeffe feefeffe feefeffe feefeffe  
3ffff560:  feefeffe feefeffe feefeffe feefeffe  
3ffff570:  feefeffe feefeffe feefeffe feefeffe  
3ffff580:  feefeffe feefeffe feefeffe feefeffe  
3ffff590:  feefeffe feefeffe feefeffe feefeffe  
3ffff5a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff5b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff5c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff5d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff5e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff5f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff600:  feefeffe feefeffe feefeffe feefeffe  
3ffff610:  feefeffe feefeffe feefeffe feefeffe  
3ffff620:  feefeffe feefeffe feefeffe feefeffe  
3ffff630:  feefeffe feefeffe feefeffe feefeffe  
3ffff640:  feefeffe feefeffe feefeffe feefeffe  
3ffff650:  feefeffe feefeffe feefeffe feefeffe  
3ffff660:  feefeffe feefeffe feefeffe feefeffe  
3ffff670:  feefeffe feefeffe feefeffe feefeffe  
3ffff680:  feefeffe feefeffe feefeffe feefeffe  
3ffff690:  feefeffe feefeffe feefeffe feefeffe  
3ffff6a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff6b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff6c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff6d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff6e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff6f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff700:  feefeffe feefeffe feefeffe feefeffe  
3ffff710:  feefeffe feefeffe feefeffe feefeffe  
3ffff720:  feefeffe feefeffe feefeffe feefeffe  
3ffff730:  feefeffe feefeffe feefeffe feefeffe  
3ffff740:  feefeffe feefeffe feefeffe feefeffe  
3ffff750:  feefeffe feefeffe feefeffe feefeffe  
3ffff760:  feefeffe feefeffe feefeffe feefeffe  
3ffff770:  feefeffe feefeffe feefeffe feefeffe  
3ffff780:  feefeffe feefeffe feefeffe feefeffe  
3ffff790:  feefeffe feefeffe feefeffe feefeffe  
3ffff7a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff7b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff7c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff7d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff7e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff7f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff800:  feefeffe feefeffe feefeffe feefeffe  
3ffff810:  feefeffe feefeffe feefeffe feefeffe  
3ffff820:  feefeffe feefeffe feefeffe feefeffe  
3ffff830:  feefeffe feefeffe feefeffe feefeffe  
3ffff840:  feefeffe feefeffe feefeffe feefeffe  
3ffff850:  feefeffe feefeffe feefeffe feefeffe  
3ffff860:  feefeffe feefeffe feefeffe feefeffe  
3ffff870:  feefeffe feefeffe feefeffe feefeffe  
3ffff880:  feefeffe feefeffe feefeffe feefeffe  
3ffff890:  feefeffe feefeffe feefeffe feefeffe  
3ffff8a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff8b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff8c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff8d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff8e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff8f0:  feefeffe feefeffe feefeffe feefeffe  
3ffff900:  feefeffe feefeffe feefeffe feefeffe  
3ffff910:  feefeffe feefeffe feefeffe feefeffe  
3ffff920:  feefeffe feefeffe feefeffe feefeffe  
3ffff930:  feefeffe feefeffe feefeffe feefeffe  
3ffff940:  feefeffe feefeffe feefeffe feefeffe  
3ffff950:  feefeffe feefeffe feefeffe feefeffe  
3ffff960:  feefeffe feefeffe feefeffe feefeffe  
3ffff970:  feefeffe feefeffe feefeffe feefeffe  
3ffff980:  feefeffe feefeffe feefeffe feefeffe  
3ffff990:  feefeffe feefeffe feefeffe feefeffe  
3ffff9a0:  feefeffe feefeffe feefeffe feefeffe  
3ffff9b0:  feefeffe feefeffe feefeffe feefeffe  
3ffff9c0:  feefeffe feefeffe feefeffe feefeffe  
3ffff9d0:  feefeffe feefeffe feefeffe feefeffe  
3ffff9e0:  feefeffe feefeffe feefeffe feefeffe  
3ffff9f0:  feefeffe feefeffe feefeffe feefeffe  
3ffffa00:  feefeffe feefeffe feefeffe feefeffe  
3ffffa10:  feefeffe feefeffe feefeffe feefeffe  
3ffffa20:  feefeffe feefeffe feefeffe feefeffe  
3ffffa30:  feefeffe feefeffe feefeffe feefeffe  
3ffffa40:  feefeffe feefeffe feefeffe feefeffe  
3ffffa50:  feefeffe feefeffe feefeffe feefeffe  
3ffffa60:  feefeffe feefeffe feefeffe feefeffe  
3ffffa70:  feefeffe feefeffe feefeffe feefeffe  
3ffffa80:  feefeffe feefeffe feefeffe feefeffe  
3ffffa90:  feefeffe feefeffe feefeffe feefeffe  
3ffffaa0:  feefeffe feefeffe feefeffe feefeffe  
3ffffab0:  feefeffe feefeffe feefeffe feefeffe  
3ffffac0:  feefeffe feefeffe feefeffe feefeffe  
3ffffad0:  feefeffe feefeffe feefeffe feefeffe  
3ffffae0:  feefeffe feefeffe feefeffe feefeffe  
3ffffaf0:  feefeffe feefeffe feefeffe feefeffe  
3ffffb00:  00000005 00000000 00000020 40100f22  
3ffffb10:  3ffe93c5 4010431f 3ffece28 feefeffe  
3ffffb20:  40101c3d 3ffece28 feefeffe feefeffe  
3ffffb30:  fffffff2 0b614e46 3ffed85c 40101e0e  
3ffffb40:  3ffe9c70 00000000 00000000 feefeffe  
3ffffb50:  fffffff2 0b614e46 4010224e 00000100  
3ffffb60:  7fffffff 3ffe9c70 3ffe9c70 00000001  
3ffffb70:  00000001 00000080 00000000 ffffffff  
3ffffb80:  40225250 0b614e46 00000000 4000050c  
3ffffb90:  00000000 00000000 0000001f 40104bfd  
3ffffba0:  4000050c 00000000 0000001f 40104bfd  
3ffffbb0:  40000f83 00000030 00000000 ffffffff  
3ffffbc0:  4022430a 00000023 000c0240 7a800000  
3ffffbd0:  00000001 3ffed91c 00000000 00000000  
3ffffbe0:  ff000fff 00ffffff 00000060 3ffecb30  
3ffffbf0:  3ffef58c 00000001 3fff0140 00000030  
3ffffc00:  402175a4 3ffef954 3fff0140 4010498c  
3ffffc10:  00000052 3ffef954 0000007f 00000003  
3ffffc20:  00000001 fffffffd 00000001 3fff0140  
3ffffc30:  3ffef954 3fff8424 3fff0140 00000030  
3ffffc40:  00000000 00000000 0000001f 40104bfd  
3ffffc50:  4000050c 4020a20c 40225267 00000001  
3ffffc60:  ffffffff 00000000 3ffe9511 00000008  
3ffffc70:  00000001 00000000 00000014 40228ddb  
3ffffc80:  4022539a 3ffecb30 4010106b 3ffecb30  
3ffffc90:  00000014 3fff0140 00000008 3fffbef4  
3ffffca0:  40224324 3ffecb30 3ffed2b0 3fff0140  
3ffffcb0:  00000000 402177e3 3ffee110 3ffffe50  
3ffffcc0:  00000000 00000002 00000001 3ffecb30  
3ffffcd0:  3fffbf0e 401049a3 3fff0140 3ffef954  
3ffffce0:  3fffbecc 3ffeff50 00000008 00000000  
3ffffcf0:  00000005 4020bb85 3ffeefcc 3ffef954  
3ffffd00:  3fffbf0e 00000052 3ffece28 00000030  
3ffffd10:  40101c3d 3ffece28 40225267 3ffef3e1  
3ffffd20:  3ffef3ac 3ffef3ac 3fffbecc 4020beda  
3ffffd30:  4020c273 3fffbecc 3fffbf0e 4020c27c  
3ffffd40:  00000008 3ffffd70 4010224e 4020a20c  
3ffffd50:  3ffffe80 3ffe8304 3ffffde0 3fffbf1c  
3ffffd60:  3fffbecc 3ffeff50 3ffef3ac 40211df5  
3ffffd70:  005e0001 0000fb00 0000000a 3ffffde0  
3ffffd80:  00000014 3ffeff50 3fffbecc 4021287c  
3ffffd90:  00000006 00000000 0000001f 3ffe893b  
3ffffda0:  3ffef3b0 00000001 00000000 00000011  
3ffffdb0:  3ffef34c 3ffe89c9 ffffffff 00000000  
3ffffdc0:  00000011 00000001 3f302064 3fffbecc  
3ffffdd0:  3ffeff50 3fffbf30 3ffeff4c 4021290a  
3ffffde0:  3ffef3ac 00000000 00000000 40212fdb  
3ffffdf0:  00000006 0000000a 3f302058 4020f717  
3ffffe00:  3ffef3ac 00001968 00000000 3fffb730  
3ffffe10:  3fffbecc 3ffef3ac 3ffef3b0 000014e9  
3ffffe20:  0000005a 40212eec 00000094 401004e8  
3ffffe30:  3ffeefa8 00001925 00001925 00000000  
3ffffe40:  3ffeff50 000014e9 3ffeff4c 4020f784  
3ffffe50:  fffffffc 00000001 3fffbbbc 4020f7f8  
3ffffe60:  40104d40 05e9cbbb 3ffeef84 00000000  
3ffffe70:  3ffee680 3ffeef84 3ffe8508 3ffeef84  
3ffffe80:  00000002 3ffffec0 402054d8 3fffefb0  
3ffffe90:  3ffeef84 00000002 000003e8 4020155b  
3ffffea0:  00000001 00000001 3ffeedfc 4020356d  
3ffffeb0:  6f6f675f 63656c67 00747361 40203424  
3ffffec0:  00000000 00000100 00000000 d402a8c0  
3ffffed0:  00ffffff 0102a8c0 61636f6c 745f006c  
3ffffee0:  00007063 3f01000c 00000005 00000004  
3ffffef0:  0000000b 005f0000 3ffeedfc 402048be  
3fffff00:  3ffffeb0 00000001 40202f60 402047e8  
3fffff10:  00000000 00000000 0000049c 3ffeef30  
3fffff20:  3ffeedfc 00000000 3ffeec58 40204994  
3fffff30:  5f505345 31463731 00004637 3ffeef30  
3fffff40:  3fffdad0 0000001c 3ffeee70 40204ad4  
3fffff50:  3fffdad0 00000000 3ffeee70 40204cdd  
3fffff60:  3ffe8950 3ffeecd0 0004e858 3ffe891d  
3fffff70:  000001f4 3ffeef84 3ffeee70 40204dcc  
3fffff80:  3fffdad0 3ffeef30 3ffeee70 3ffeef30  
3fffff90:  3fffdad0 3ffeec58 3ffeee70 40202545  
3fffffa0:  00000000 00000000 3ffeef28 402025a1  
<<<stack<<<

last failed alloc call: 40203FEB(16)

 ets Jan  8 2013,rst cause:2, boot mode:(1,6)


 ets Jan  8 2013,rst cause:4, boot mode:(1,6)

wdt reset

[skezo]

Doing a bit more digging on this. The memory leak happens at any point no Google Home device is found. For example if you run the ghn.device(displayName) once in the initial setup() function using a displayName that is not on the network the mDNS lookups (ESP8266mDNS.cpp/h) will continue to search for it after the timeout from esp8266-google-home-notifier.cpp/h.

Code sample:

...
void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }
  Serial.println("connecting to Google Home...");
  if (ghn.device(displayName, "en") != true) {
    Serial.println(ghn.getLastError());
    return;
  }
  Serial.print("found Google Home(");
}
void loop() {
}
...

[skezo]

The issue seems to be cause by GoogleHomeNotifier::device repeating to call to MDNS.begin(hostString) in ESP8266mDNS.cpp.

[horihiro]

Thanks!