H801 with 512KB flash supported

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[x] Searched the problem in issues (https://github.com/arendst/Sonoff-Tasmota/issues)
[x] Searched the problem in the wiki (https://github.com/arendst/Sonoff-Tasmota/wiki/Troubleshooting)
[x] Searched the problem in the forum (https://forum.digital-pig.com/)
[x] Searched the problem in the discussion group (https://groups.google.com/d/forum/sonoffusers)
[x] Hardware used : H801

[x] Provide the output of command status 0 :

12:21:05 CMD: status 0
12:21:05 MQT: stat/sonoff/STATUS = {"Status":{"Module":20,"FriendlyName":["Sonoff"],"Topic":"sonoff","ButtonTopic":"0","Power":0,"PowerOnState":3,"LedState":1,"SaveData":1,"SaveState":1,"ButtonRetain":0,"PowerRetain":0}}
12:21:05 MQT: stat/sonoff/STATUS1 = {"StatusPRM":{"Baudrate":115200,"GroupTopic":"sonoffs","OtaUrl":"http://sonoff.maddox.co.uk/tasmota/sonoff.bin","RestartReason":"External System","Uptime":"0T00:00:15","StartupUTC":"2018-06-13T11:20:50","Sleep":0,"BootCount":1,"SaveCount":0,"SaveAddress":"FB000"}}
12:21:05 MQT: stat/sonoff/STATUS2 = {"StatusFWR":{"Version":"6.0.0a-minimal","BuildDateTime":"2018-06-13T13:20:30","Boot":31,"Core":"2_3_0","SDK":"1.5.3(aec24ac9)"}}
12:21:05 MQT: stat/sonoff/STATUS3 = {"StatusLOG":{"SerialLog":2,"WebLog":2,"SysLog":2,"LogHost":"192.168.201.10","LogPort":514,"SSId":["Dawes",""],"TelePeriod":300,"SetOption":["00008009","55818000"]}}
12:21:05 MQT: stat/sonoff/STATUS4 = {"StatusMEM":{"ProgramSize":436,"Free":564,"Heap":22,"ProgramFlashSize":512,"FlashSize":512,"FlashMode":3,"Features":["00000809","04082580","0C000002","15021702","00000000"]}}
12:21:05 MQT: stat/sonoff/STATUS5 = {"StatusNET":{"Hostname":"sonoff-6212","IPAddress":"192.168.201.115","Gateway":"192.168.201.1","Subnetmask":"255.255.255.0","DNSServer":"192.168.201.1","Mac":"18:FE:34:9D:98:44","Webserver":2,"WifiConfig":2}}
12:21:05 MQT: stat/sonoff/STATUS6 = {"StatusMQT":{"MqttHost":"home.dawes.za.net","MqttPort":1883,"MqttClientMask":"DVES_%06X","MqttClient":"DVES_9D9844","MqttUser":"DVES_USER","MqttType":1,"MAX_PACKET_SIZE":1000,"KEEPALIVE":15}}
12:21:05 MQT: stat/sonoff/STATUS7 = {"StatusTIM":{"UTC":"Wed Jun 13 11:21:05 2018","Local":"Wed Jun 13 12:21:05 2018","StartDST":"Sun Mar 25 02:00:00 2018","EndDST":"Sun Oct 28 03:00:00 2018","Timezone":1}}
12:21:05 MQT: stat/sonoff/STATUS10 = {"StatusSNS":{"Time":"2018-06-13T12:21:05"}}
12:21:05 MQT: stat/sonoff/STATUS11 = {"StatusSTS":{"Time":"2018-06-13T12:21:05","Uptime":"0T00:00:15","Vcc":3.081,"POWER":"OFF","Dimmer":10,"Color":"1919191919","HSBColor":"0,0,10","Channel":[10,10,10,10,10],"CT":500,"Scheme":0,"Fade":"OFF","Speed":1,"LedTable":"OFF","Wifi":{"AP":1,"SSId":"Dawes","RSSI":58,"APMac":"F0:9F:C2:31:B1:57"}}}

Hi folks,

I have an H801 module that only has 512KB of flash. Trying to use any of the non-minimal firmwares (unsurprisingly?) results in a reboot loop.

I guess this is not so much a troubleshooting issue, as a "Hey, I solved it myself", because I copied a linker script for a 512kB flash with no SPIFFS, reduced the size of the module by commenting out some features that I didn't need, and rebuilding.

Here is the linker script, if there is anyone else in the same boat:

/* Flash Split for 512K chips */
/* sketch 487KB */
/* eeprom 20KB */

MEMORY
{
  dport0_0_seg :                        org = 0x3FF00000, len = 0x10
  dram0_0_seg :                         org = 0x3FFE8000, len = 0x14000
  iram1_0_seg :                         org = 0x40100000, len = 0x8000
  irom0_0_seg :                         org = 0x40201010, len = 0x79ff0
}

PROVIDE ( _SPIFFS_start = 0x4027B000 );
PROVIDE ( _SPIFFS_end = 0x4027B000 );
PROVIDE ( _SPIFFS_page = 0x0 );
PROVIDE ( _SPIFFS_block = 0x0 );

INCLUDE "esp8266.flash.common.ld"

Obviously, I also had to update platformio.ini to refer to the new linker file.

arendst / Tasmota

H801 with 512KB flash supported #2982