{"action":"opened","issue":{"url":"https://api.github.com/repos/micropython/micropython/issues/3651","repository_url":"https://api.github.com/repos/micropython/micropython","labels_url":"https://api.github.com/repos/micropython/micropython/issues/3651/labels{/name}","comments_url":"https://api.github.com/repos/micropython/micropython/issues/3651/comments","events_url":"https://api.github.com/repos/micropython/micropython/issues/3651/events","html_url":"https://github.com/micropython/micropython/issues/3651","id":301744151,"number":3651,"title":"esp32: latest prebuilt firmware hangs","user":{"login":"tuupola","id":21913,"avatar_url":"https://avatars0.githubusercontent.com/u/21913?v=4","gravatar_id":"","url":"https://api.github.com/users/tuupola","html_url":"https://github.com/tuupola","followers_url":"https://api.github.com/users/tuupola/followers","following_url":"https://api.github.com/users/tuupola/following{/other_user}","gists_url":"https://api.github.com/users/tuupola/gists{/gist_id}","starred_url":"https://api.github.com/users/tuupola/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tuupola/subscriptions","organizations_url":"https://api.github.com/users/tuupola/orgs","repos_url":"https://api.github.com/users/tuupola/repos","events_url":"https://api.github.com/users/tuupola/events{/privacy}","received_events_url":"https://api.github.com/users/tuupola/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-03-02T12:00:35Z","updated_at":"2018-03-02T12:00:35Z","closed_at":null,"author_association":"NONE","body":"Just a quick note. Latest prebuilt firmware (esp32-20180302-v1.9.3-386-g9884a2c7.bin) does not boot up. Older prebuilt firmwares I have downloaded previously work ok which should rule out a faulty board.\r\n\r\n```\r\n$ esptool.py --port /dev/cu.SLAB_USBtoUART  --baud 115200 --after no_reset erase_flash\r\nesptool.py v2.2.1\r\nConnecting........_\r\nDetecting chip type... ESP32\r\nChip is ESP32D0WDQ6 (revision 1)\r\nUploading stub...\r\nRunning stub...\r\nStub running...\r\nErasing flash (this may take a while)...\r\nChip erase completed successfully in 3.1s\r\nStaying in bootloader.\r\n\r\n$ esptool.py --port /dev/cu.SLAB_USBtoUART --baud 115200 write_flash --flash_mode dio --flash_freq 80m --flash_size detect 0x1000 esp32-20180302-v1.9.3-386-g9884a2c7.bin\r\n\r\nesptool.py v2.2.1\r\nConnecting........_\r\nDetecting chip type... ESP32\r\nChip is ESP32D0WDQ6 (revision 1)\r\nUploading stub...\r\nRunning stub...\r\nStub running...\r\nConfiguring flash size...\r\nAuto-detected Flash size: 4MB\r\nFlash params set to 0x022f\r\nCompressed 973424 bytes to 604061...\r\nWrote 973424 bytes (604061 compressed) at 0x00001000 in 53.3 seconds (effective 146.0 kbit/s)...\r\nHash of data verified.\r\n\r\nLeaving...\r\nHard resetting...\r\n\r\n$ screen /dev/tty.SLAB_USBtoUART 115200\r\n\r\n<pressed reset here>\r\n\r\nets Jun  8 2016 00:22:57\r\n\r\nrst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)\r\nconfigsip: 0, SPIWP:0xee\r\nclk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00\r\nmode:DIO, clock div:1\r\nload:0x3fff0018,len:4\r\nload:0x3fff001c,len:4436\r\nload:0x40078000,len:0\r\nload:0x40078000,len:11816\r\nentry 0x4007a9fc\r\n```"}}
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